diff --git a/build.gradle b/build.gradle
index 4e7734cd..d83388d0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,13 +1,16 @@
+import dev.sorn.fmp4j.CoveragePlugin
+import dev.sorn.fmp4j.SnakeCaseMethodFormatter
+
 plugins {
     id 'java-library'
     id 'java-test-fixtures'
     id 'checkstyle'
     id 'jacoco'
     id 'com.vanniktech.maven.publish' version '0.34.0'
-    id 'com.diffplug.spotless' version '7.2.0'
+    id 'com.diffplug.spotless'
 }
 
-apply plugin: dev.sorn.fmp4j.CoveragePlugin
+apply plugin: CoveragePlugin
 
 group = 'dev.sorn.fmp4j'
 version = projectVersion
@@ -18,6 +21,14 @@ java {
     }
 }
 
+spotless {
+    java {
+        googleJavaFormat()
+        removeUnusedImports()
+        addStep(new SnakeCaseMethodFormatter())
+    }
+}
+
 repositories {
     mavenCentral()
 }
@@ -28,6 +39,8 @@ dependencies {
     implementation("com.fasterxml.jackson.core:jackson-databind:${jacksonVersion}")
     implementation("org.apache.httpcomponents.client5:httpclient5:${apacheHttpComponentsVersion}")
     implementation("org.apache.commons:commons-lang3:${apacheCommonsVersion}")
+    implementation("com.diffplug.spotless:spotless-plugin-gradle:${spotlessVersion}")
+
     testImplementation("org.mockito:mockito-core:${mockitoCoreVersion}")
     testImplementation("org.mockito:mockito-junit-jupiter:${mockitoJunitVersion}")
     testImplementation(platform("org.junit:junit-bom:${junitVersion}"))
diff --git a/buildSrc/build.gradle b/buildSrc/build.gradle
index 2d087cae..1f4fd27e 100644
--- a/buildSrc/build.gradle
+++ b/buildSrc/build.gradle
@@ -9,4 +9,15 @@ repositories {
 dependencies {
     implementation gradleApi()
     implementation localGroovy()
+    implementation("com.diffplug.spotless:spotless-plugin-gradle:${spotlessVersion}")
+    implementation("com.github.javaparser:javaparser-core:${javaparserVersion}")
+
+    testImplementation(platform("org.junit:junit-bom:${junitVersion}"))
+    testImplementation("org.junit.jupiter:junit-jupiter-api")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+}
+
+test {
+    useJUnitPlatform()
 }
\ No newline at end of file
diff --git a/buildSrc/gradle.properties b/buildSrc/gradle.properties
new file mode 100644
index 00000000..20859db4
--- /dev/null
+++ b/buildSrc/gradle.properties
@@ -0,0 +1,3 @@
+spotlessVersion=7.2.0
+javaparserVersion=3.27.0
+junitVersion=5.10.0
\ No newline at end of file
diff --git a/buildSrc/src/main/groovy/CoveragePlugin.groovy b/buildSrc/src/main/groovy/dev/sorn/fmp4j/CoveragePlugin.groovy
similarity index 100%
rename from buildSrc/src/main/groovy/CoveragePlugin.groovy
rename to buildSrc/src/main/groovy/dev/sorn/fmp4j/CoveragePlugin.groovy
diff --git a/buildSrc/src/main/java/dev/sorn/fmp4j/SnakeCaseMethodFormatter.java b/buildSrc/src/main/java/dev/sorn/fmp4j/SnakeCaseMethodFormatter.java
new file mode 100644
index 00000000..357b0036
--- /dev/null
+++ b/buildSrc/src/main/java/dev/sorn/fmp4j/SnakeCaseMethodFormatter.java
@@ -0,0 +1,67 @@
+package dev.sorn.fmp4j;
+
+import com.diffplug.spotless.FormatterStep;
+import java.io.File;
+import java.io.Serial;
+import java.util.Locale;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+
+public class SnakeCaseMethodFormatter implements FormatterStep {
+    @Serial
+    private static final long serialVersionUID = 1L;
+
+    // Set of annotations that identify a method as a unit test
+    private static final Pattern TEST_METHOD_PATTERN = Pattern.compile(
+            "(@(?:Test|ParameterizedTest|RepeatedTest|TestFactory)(?:[\\s\\S](?!;|\\{))*?\\s+)([a-zA-Z0-9_]+)(\\s*\\()"
+    );
+
+    private static final Pattern SNAKE_CASE_PATTERN = Pattern.compile("^[a-z][a-z0-9_]*$");
+
+    @Override
+    public String getName() {
+        return "Unit test Naming Enforcement (snake_case)";
+    }
+
+    @Override
+    public String format(String rawUnix, File file) throws Exception {
+        Matcher matcher = TEST_METHOD_PATTERN.matcher(rawUnix);
+        StringBuilder sb = new StringBuilder();
+
+        while (matcher.find()) {
+            String context = matcher.group(1); // Annotation + modifiers + return type
+            String methodName = matcher.group(2); // Current method name
+            String paramsStart = matcher.group(3); // "("
+
+            // Only replace if it fails snake_case check
+            if (!SNAKE_CASE_PATTERN.matcher(methodName).matches()) {
+                String newName = toSnakeCase(methodName);
+                // Replace the name group, preserving context and params
+                matcher.appendReplacement(sb, Matcher.quoteReplacement(context + newName + paramsStart));
+            }
+        }
+        matcher.appendTail(sb);
+
+        return sb.toString();
+    }
+
+    /**
+     * Converts a camelCase string to snake_case.
+     * Example: "testUserProfile" -> "test_user_profile"
+     */
+    private String toSnakeCase(String input) {
+        // Regex to look for instances of LowerUpper (e.g. "tU") and insert underscore
+        String regex = "([a-z])([A-Z]+)";
+        String replacement = "$1_$2";
+
+        // Apply replacement and convert to lowercase
+        return input.replaceAll(regex, replacement).toLowerCase(Locale.ROOT);
+    }
+
+    @Override
+    public void close() throws Exception {
+        // No resources to close
+    }
+}
+
diff --git a/buildSrc/src/test/java/dev/sorn/fmp4j/SnakeCaseMethodFormatterTest.java b/buildSrc/src/test/java/dev/sorn/fmp4j/SnakeCaseMethodFormatterTest.java
new file mode 100644
index 00000000..302f387f
--- /dev/null
+++ b/buildSrc/src/test/java/dev/sorn/fmp4j/SnakeCaseMethodFormatterTest.java
@@ -0,0 +1,156 @@
+package dev.sorn.fmp4j;
+
+import static org.junit.jupiter.api.Assertions.assertAll;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import java.io.File;
+
+
+class SnakeCaseMethodFormatterTest {
+
+    private SnakeCaseMethodFormatter formatter;
+
+    @BeforeEach
+    void setUp() {
+        formatter = new SnakeCaseMethodFormatter();
+    }
+
+    @Test
+    void should_rename_camel_case_unit_test_to_snake_case() throws Exception {
+        // Given: A class with a camelCase @Test method
+        String source = """
+                public class MyTest {
+                    @Test
+                    public void testLoginFeature() {
+                        System.out.println("Testing...");
+                    }
+                }
+                """;
+
+        // When
+        String result = formatter.format(source, new File("dummy.java"));
+
+        // Then
+        assertTrue(result.contains("void test_login_feature()"),
+                "The method name should be converted to snake_case");
+        assertFalse(result.contains("testLoginFeature"),
+                "The old camelCase name should no longer exist");
+    }
+
+    @Test
+    void should_not_rename_non_test_methods() throws Exception {
+        // Given: A class with a helper method (no @Test annotation)
+        String source = """
+                public class MyTest {
+                    public void helperMethod() {
+                        // do something
+                    }
+                }
+                """;
+
+        // When
+        String result = formatter.format(source, null);
+
+        // Then
+        assertTrue(result.contains("void helperMethod()"),
+                "Non-test methods should retain their original name");
+    }
+
+    @Test
+    void should_ignore_already_snake_case_tests() throws Exception {
+        // Given: A class with an existing snake_case test
+        String source = """
+                public class MyTest {
+                    @Test
+                    public void test_existing_snake_case() {
+                    }
+                }
+                """;
+
+        // When
+        String result = formatter.format(source, null);
+
+        // Then: The method returns the original string if no changes were made
+        assertEquals(source, result,
+                "The source code should remain unchanged if the name is already correct");
+    }
+
+    @Test
+    void should_handle_mixed_methods_correctly() throws Exception {
+        // Given: One test to rename, one helper to ignore, one test already correct
+        String source = """
+                public class MixedTest {
+                    @Test
+                    public void shouldCalculateSum() {}
+                    
+                    public void setupDatabase() {}
+                    
+                    @Test
+                    public void test_already_good() {}
+                }
+                """;
+
+        // When
+        String result = formatter.format(source, null);
+
+        // Then
+        assertAll("Verify all method states",
+                () -> assertTrue(result.contains("void should_calculate_sum()"), "CamelCase test should be renamed"),
+                () -> assertTrue(result.contains("void setupDatabase()"), "Helper method should not change"),
+                () -> assertTrue(result.contains("void test_already_good()"), "Snake case test should stay snake case")
+        );
+    }
+
+    @Test
+    void should_handle_complex_test_annotations() throws Exception {
+        // Given: One test to rename, one helper to ignore, one test already correct
+        String source = """
+                public class MixedTest {
+                    @ParameterizedTest
+                    @MethodSource("someFactoryMethod")
+                    void validValue() {
+                        //do something
+                    }
+                }
+                """;
+
+        // When
+        String result = formatter.format(source, null);
+
+        // Then
+        assertAll("Verify all method states",
+                () -> assertTrue(result.contains("void valid_value()"), "CamelCase test should be renamed"),
+                () -> assertTrue(result.contains("@ParameterizedTest"), "Annotation should not be moved"),
+                () -> assertTrue(result.contains("@MethodSource(\"someFactoryMethod\")"), "Annotation should not be moved")
+        );
+    }
+
+    @Test
+    void should_handle_inline_comment() throws Exception {
+        // Given: One test to rename, one helper to ignore, one test already correct
+        String source = """
+                class InlineCommentTest {
+                     @Test
+                     void doSomethingHere() {
+                         Stream.of(
+                                 "" // empty string
+                                 );
+                     }
+                }
+                """;
+
+        // When
+        String result = formatter.format(source, null);
+
+        // Then
+        assertAll("Verify all method states",
+                () -> assertTrue(result.contains("do_something_here"), "CamelCase test should be renamed"),
+                () -> assertTrue(result.contains("\"\" // empty string"), "Inline comment should remain in place")
+                );
+    }
+}
+
diff --git a/gradle.properties b/gradle.properties
index 75435c08..a0a9b294 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,6 +8,7 @@ apacheCommonsVersion=3.18.0
 apacheHttpComponentsVersion=5.5
 jacksonVersion=2.19.2
 jacksonCsvVersion=2.17.2
+spotlessVersion=7.2.0
 
 # Publishing
 mavenCentralPublishing=true
diff --git a/src/main/java/dev/sorn/fmp4j/types/FmpSymbol.java b/src/main/java/dev/sorn/fmp4j/types/FmpSymbol.java
index 7830cc59..ce9cb904 100644
--- a/src/main/java/dev/sorn/fmp4j/types/FmpSymbol.java
+++ b/src/main/java/dev/sorn/fmp4j/types/FmpSymbol.java
@@ -16,8 +16,13 @@ public final class FmpSymbol implements Comparable<FmpSymbol>, FmpValueObject<St
     // 5. OR
     // 6. Dot separator followed by segment (1-4 characters, starting with letter)
     // 7. End group, repeated zero or more times
-    public static final Pattern FMP_SYMBOL_PATTERN = compile("^(?:[A-Z0-9]{1,5}:)?" + "[A-Z0-9&]{1,16}" + "(?:"
-            + "(?:[-/][A-Z][A-Z0-9]{0,9})" + "|" + "(?:\\.[A-Z][A-Z0-9]{0,3})" + ")*$");
+    public static final Pattern FMP_SYMBOL_PATTERN = compile("^(?:[A-Z0-9]{1,5}:)?"
+            + "[A-Z0-9&]{1,16}"
+            + "(?:"
+            + "(?:[-/][A-Z][A-Z0-9]{0,9})"
+            + "|"
+            + "(?:\\.[A-Z][A-Z0-9]{0,3})"
+            + ")*$");
 
     @Serial
     private static final long serialVersionUID = 1L;
diff --git a/src/test/java/dev/sorn/fmp4j/FmpClientTest.java b/src/test/java/dev/sorn/fmp4j/FmpClientTest.java
index b1a6e36c..6035b87e 100644
--- a/src/test/java/dev/sorn/fmp4j/FmpClientTest.java
+++ b/src/test/java/dev/sorn/fmp4j/FmpClientTest.java
@@ -96,7 +96,7 @@ void setUp() {
     }
 
     @Test
-    void testConstructor_doesNotThrowAndCreatesInstance() {
+    void test_constructor_does_not_throw_and_creates_instance() {
         // given
         setProperty(FmpConfigImpl.FMP4J_API_KEY_ENV, "ABCDEf0ghIjklmNO1pqRsT2u34VWx5y6");
         setProperty(FmpConfigImpl.FMP4J_BASE_URL_ENV, "https://financialmodelingprep.com/stable");
@@ -106,7 +106,7 @@ void testConstructor_doesNotThrowAndCreatesInstance() {
     }
 
     @Test
-    void searchPressReleases() {
+    void search_press_releases() {
         // given
         var symbol = symbol("V");
         var endpoint = "news/press-releases";
@@ -121,7 +121,7 @@ void searchPressReleases() {
     }
 
     @Test
-    void searchByIsin() {
+    void search_by_isin() {
         // given
         var isin = isin("NL0012969182");
         var endpoint = "search-isin";
@@ -136,7 +136,7 @@ void searchByIsin() {
     }
 
     @Test
-    void searchByName() {
+    void search_by_name() {
         // given
         var query = "ADYEN";
         var endpoint = "search-name";
@@ -168,7 +168,7 @@ void cashFlowStatementGrowthBulk(String p) {
     }
 
     @Test
-    void searchByCusip() {
+    void search_by_cusip() {
         // given
         var cusip = cusip("037833100");
         var endpoint = "search-cusip";
@@ -183,7 +183,7 @@ void searchByCusip() {
     }
 
     @Test
-    void searchBySymbol() {
+    void search_by_symbol() {
         // given
         var query = symbol("ADYEN");
         var endpoint = "search-symbol";
@@ -198,7 +198,7 @@ void searchBySymbol() {
     }
 
     @Test
-    void searchByCik() {
+    void search_by_cik() {
         // given
         var cik = cik("0000320193");
         var endpoint = "search-cik";
@@ -213,7 +213,7 @@ void searchByCik() {
     }
 
     @Test
-    void stockDirectory() {
+    void stock_directory() {
         // given
         var endpoint = "stock-list";
         var file = format("stable/%s/excerpt.json", endpoint);
@@ -227,7 +227,7 @@ void stockDirectory() {
     }
 
     @Test
-    void etfDirectory() {
+    void etf_directory() {
         // given
         var endpoint = "etf-list";
         var file = format("stable/%s/excerpt.json", endpoint);
@@ -304,7 +304,7 @@ void earnings() {
     }
 
     @Test
-    void iposCalendar() {
+    void ipos_calendar() {
         // given
         var from = Optional.of(LocalDate.parse("2024-02-28"));
         var to = Optional.of(LocalDate.parse("2025-02-28"));
@@ -320,7 +320,7 @@ void iposCalendar() {
     }
 
     @Test
-    void iposDisclosure() {
+    void ipos_disclosure() {
         // given
         var from = Optional.of(LocalDate.parse("2024-02-28"));
         var to = Optional.of(LocalDate.parse("2025-02-28"));
@@ -336,7 +336,7 @@ void iposDisclosure() {
     }
 
     @Test
-    void iposProspectus() {
+    void ipos_prospectus() {
         // given
         var from = Optional.of(LocalDate.parse("2024-02-28"));
         var to = Optional.of(LocalDate.parse("2025-02-28"));
@@ -352,7 +352,7 @@ void iposProspectus() {
     }
 
     @Test
-    void historicalPriceEodLight() {
+    void historical_price_eod_light() {
         // given
         var endpoint = "historical-price-eod/light";
         var symbol = symbol("AAPL");
@@ -369,7 +369,7 @@ void historicalPriceEodLight() {
     }
 
     @Test
-    void historicalPriceEodFull() {
+    void historical_price_eod_full() {
         // given
         var endpoint = "historical-price-eod/full";
         var symbol = symbol("AAPL");
@@ -453,7 +453,7 @@ void incomeStatements(String p) {
     }
 
     @Test
-    void incomeStatementTtm() {
+    void income_statement_ttm() {
         // given
         var symbol = symbol("AAPL");
         var limit = limit(2);
@@ -540,7 +540,7 @@ void balanceSheetStatementsBulk(String periodType) {
     }
 
     @Test
-    void balanceSheetStatementTtm() {
+    void balance_sheet_statement_ttm() {
         // given
         var symbol = symbol("AAPL");
         var limit = limit(2);
@@ -628,7 +628,7 @@ void cashFlowStatementsBulk(String p) {
     }
 
     @Test
-    void cashFlowStatementTtm() {
+    void cash_flow_statement_ttm() {
         // given
         var symbol = symbol("AAPL");
         var limit = limit(2);
@@ -725,7 +725,7 @@ void ratios(String p) {
     }
 
     @Test
-    void ratiosTtm() {
+    void ratios_ttm() {
         // given
         var symbol = symbol("AAPL");
         var endpoint = "ratios-ttm";
@@ -758,7 +758,7 @@ void keyMetrics(String p) {
     }
 
     @Test
-    void keyMetricsTtm() {
+    void key_metrics_ttm() {
         // given
         var symbol = symbol("AAPL");
         var endpoint = "key-metrics-ttm";
@@ -830,7 +830,7 @@ void revenueGeographicSegmentation(String p, int expectedCount) {
     }
 
     @Test
-    void etfAssetExposure() {
+    void etf_asset_exposure() {
         // given
         var symbol = symbol("NVO");
         var endpoint = "etf/asset-exposure";
@@ -845,7 +845,7 @@ void etfAssetExposure() {
     }
 
     @Test
-    void etfCountryWeightings() {
+    void etf_country_weightings() {
         // given
         var symbol = symbol("SPY");
         var endpoint = "etf/country-weightings";
@@ -878,7 +878,7 @@ void etfHoldings(FmpSymbol symbol, int holdings) {
     }
 
     @Test
-    void etfInfo() {
+    void etf_info() {
         // given
         var symbol = symbol("SPY");
         var endpoint = "etf/info";
@@ -893,7 +893,7 @@ void etfInfo() {
     }
 
     @Test
-    void cryptoNews() {
+    void crypto_news() {
         // given
         var symbols = Set.of(symbol("BTCUSD"));
         var endpoint = "news/crypto";
@@ -910,7 +910,7 @@ void cryptoNews() {
     }
 
     @Test
-    void cryptoNews_multiple() {
+    void crypto_news_multiple() {
         // given
         var symbols = new TreeSet<FmpSymbol>(); // guarantee order
         symbols.add(symbol("BTCUSD"));
@@ -929,7 +929,7 @@ void cryptoNews_multiple() {
     }
 
     @Test
-    void forexNews() {
+    void forex_news() {
         // given
         var symbols = Set.of(symbol("EURUSD"));
         var endpoint = "news/forex";
@@ -946,7 +946,7 @@ void forexNews() {
     }
 
     @Test
-    void stockNews() {
+    void stock_news() {
         // given
         var symbols = Set.of(symbol("AAPL"));
         var endpoint = "news/stock";
@@ -963,7 +963,7 @@ void stockNews() {
     }
 
     @Test
-    void cryptoNews_withFromTo() {
+    void crypto_news_with_from_to() {
         // given
         var symbols = Set.of(symbol("BTCUSD"));
         var from = Optional.of(LocalDate.of(2025, 1, 1));
@@ -985,7 +985,7 @@ void cryptoNews_withFromTo() {
     }
 
     @Test
-    void etfSectorWeightings() {
+    void etf_sector_weightings() {
         // given
         var symbol = symbol("SPY");
         var endpoint = "etf/sector-weightings";
@@ -1000,7 +1000,7 @@ void etfSectorWeightings() {
     }
 
     @Test
-    void fullQuotes() {
+    void full_quotes() {
         // given
         var symbol = symbol("AAPL");
         var endpoint = "quote";
@@ -1015,7 +1015,7 @@ void fullQuotes() {
     }
 
     @Test
-    void partialQuotes() {
+    void partial_quotes() {
         // given
         var symbol = symbol("AAPL");
         var endpoint = "quote-short";
@@ -1030,7 +1030,7 @@ void partialQuotes() {
     }
 
     @Test
-    void priceChange() {
+    void price_change() {
         // given
         var symbol = symbol("AAPL");
         var endpoint = "stock-price-change";
@@ -1045,7 +1045,7 @@ void priceChange() {
     }
 
     @Test
-    void secFilingsSearchBySymbol() {
+    void sec_filings_search_by_symbol() {
         // given
         var symbol = symbol("AAPL");
         var from = LocalDate.parse("2024-01-01");
@@ -1066,7 +1066,7 @@ void secFilingsSearchBySymbol() {
     }
 
     @Test
-    void treasuryRates() {
+    void treasury_rates() {
         // given
         var from = LocalDate.parse("2024-12-30");
         var to = LocalDate.parse("2025-01-01");
@@ -1082,7 +1082,7 @@ void treasuryRates() {
     }
 
     @Test
-    void earningCallTranscript() {
+    void earning_call_transcript() {
         // given
         var symbol = symbol("AAPL");
         var year = year(2020);
@@ -1099,7 +1099,7 @@ void earningCallTranscript() {
     }
 
     @Test
-    void earningCallTranscriptDates() {
+    void earning_call_transcript_dates() {
         // given
         var symbol = symbol("AAPL");
         var endpoint = "earning-call-transcript-dates";
@@ -1114,7 +1114,7 @@ void earningCallTranscriptDates() {
     }
 
     @Test
-    void earningCallTranscriptLatest() {
+    void earning_call_transcript_latest() {
         // given
         var page = page(0);
         var limit = limit(2);
@@ -1130,7 +1130,7 @@ void earningCallTranscriptLatest() {
     }
 
     @Test
-    void earningsTranscriptList() {
+    void earnings_transcript_list() {
         // given
         var endpoint = "earnings-transcript-list";
         var file = format("stable/%s/excerpt.json", endpoint);
diff --git a/src/test/java/dev/sorn/fmp4j/TestUtils.java b/src/test/java/dev/sorn/fmp4j/TestUtils.java
index 015c6a1c..80c7c933 100644
--- a/src/test/java/dev/sorn/fmp4j/TestUtils.java
+++ b/src/test/java/dev/sorn/fmp4j/TestUtils.java
@@ -125,7 +125,8 @@ public static <T> void verifySerialization(T obj) throws IOException {
         // Verify against existing snapshot
         byte[] expected = Files.readAllBytes(snapshotPath);
         if (!Arrays.equals(expected, currentData)) {
-            throw new AssertionError("Serialization data mismatch for " + clazz.getSimpleName()
+            throw new AssertionError("Serialization data mismatch for "
+                    + clazz.getSimpleName()
                     + ". Update serialVersionUID if this is intentional.");
         }
     }
diff --git a/src/test/java/dev/sorn/fmp4j/csv/FmpCsvDeserializerTest.java b/src/test/java/dev/sorn/fmp4j/csv/FmpCsvDeserializerTest.java
index 2090e393..eab9d0a8 100644
--- a/src/test/java/dev/sorn/fmp4j/csv/FmpCsvDeserializerTest.java
+++ b/src/test/java/dev/sorn/fmp4j/csv/FmpCsvDeserializerTest.java
@@ -12,6 +12,7 @@
 import org.junit.jupiter.api.Test;
 
 class FmpCsvDeserializerTest {
+
     private FmpCsvDeserializer deserializer;
 
     @BeforeEach
@@ -29,22 +30,18 @@ void deserialize_array() {
             GOOGL,Alphabet Inc.,2800.50,50
             MSFT,Microsoft Corp.,300.75,75
             """;
-
         // when
         var result = deserializer.deserialize(csv, typeRef(TestCsvObject[].class));
-
         // then
         assertEquals(3, result.length);
         assertEquals("AAPL", result[0].symbol());
         assertEquals("Apple Inc.", result[0].name());
         assertEquals(150.25, result[0].price());
         assertEquals(100, result[0].quantity());
-
         assertEquals("GOOGL", result[1].symbol());
         assertEquals("Alphabet Inc.", result[1].name());
         assertEquals(2800.50, result[1].price());
         assertEquals(50, result[1].quantity());
-
         assertEquals("MSFT", result[2].symbol());
         assertEquals("Microsoft Corp.", result[2].name());
         assertEquals(300.75, result[2].price());
@@ -60,17 +57,14 @@ void deserialize_array_with_null_values() {
             AAPL,Apple Inc.,,100
             GOOGL,,2800.50,
             """;
-
         // when
         var result = deserializer.deserialize(csv, typeRef(TestCsvObject[].class));
-
         // then
         assertEquals(2, result.length);
         assertEquals("AAPL", result[0].symbol());
         assertEquals("Apple Inc.", result[0].name());
         assertNull(result[0].price());
         assertEquals(100, result[0].quantity());
-
         assertEquals("GOOGL", result[1].symbol());
         assertNull(result[1].name());
         assertEquals(2800.50, result[1].price());
@@ -78,17 +72,15 @@ void deserialize_array_with_null_values() {
     }
 
     @Test
-    void deserialize_array_withByteOrderMark() {
+    void deserialize_array_with_byte_order_mark() {
         // given
         var csv =
                 """
             \uFEFFsymbol,name,price,quantity
             AAPL,Apple Inc.,150.25,100
             """;
-
         // when
         var result = deserializer.deserialize(csv, typeRef(TestCsvObject[].class));
-
         // then
         assertEquals(1, result.length);
         assertEquals("AAPL", result[0].symbol());
@@ -103,10 +95,8 @@ void deserialize_array_empty_content() {
         var csv = """
             symbol,name,price,quantity
             """;
-
         // when
         var result = deserializer.deserialize(csv, typeRef(TestCsvObject[].class));
-
         // then
         assertEquals(0, result.length);
     }
@@ -119,7 +109,6 @@ void deserialize_array_fails_on_malformed_csv() {
             symbol,name,price,quantity
             AAPL,Apple Inc.,not_a_number,100
             """;
-
         // when // then
         var e = assertThrows(
                 FmpDeserializationException.class,
@@ -140,10 +129,8 @@ void deserialize_array_with_trailing_comma() {
             symbol,name,price,quantity,
             AAPL,Apple Inc.,150.25,100,
             """;
-
         // when
         var result = deserializer.deserialize(csv, typeRef(TestCsvObject[].class));
-
         // then
         assertEquals(1, result.length);
         assertEquals("AAPL", result[0].symbol());
@@ -159,10 +146,8 @@ void deserialize_array_with_empty_string_as_null() {
             symbol,name,price,quantity
             AAPL,"",150.25,100
             """;
-
         // when
         var result = deserializer.deserialize(csv, typeRef(TestCsvObject[].class));
-
         // then
         assertEquals(1, result.length);
         assertEquals("AAPL", result[0].symbol());
diff --git a/src/test/java/dev/sorn/fmp4j/http/FmpUriUtilsTest.java b/src/test/java/dev/sorn/fmp4j/http/FmpUriUtilsTest.java
index 4af80936..7bd6c7c5 100644
--- a/src/test/java/dev/sorn/fmp4j/http/FmpUriUtilsTest.java
+++ b/src/test/java/dev/sorn/fmp4j/http/FmpUriUtilsTest.java
@@ -15,7 +15,7 @@
 
 class FmpUriUtilsTest {
     @Test
-    void uriWithParams_single_param() {
+    void uri_with_params_single_param() {
         // given
         var uri = uri("https://example.com");
         var params = Map.<String, Object>of("param", 42);
@@ -28,7 +28,7 @@ void uriWithParams_single_param() {
     }
 
     @Test
-    void uriWithParams_multiple_params() {
+    void uri_with_params_multiple_params() {
         // given
         var uri = uri("https://example.com");
         var params = Map.<String, Object>of("param", 42);
@@ -41,7 +41,7 @@ void uriWithParams_multiple_params() {
     }
 
     @Test
-    void uriWithParams_null_params() {
+    void uri_with_params_null_params() {
         // given
         var uri = uri("https://example.com");
         var params = (Map<String, Object>) null;
@@ -54,7 +54,7 @@ void uriWithParams_null_params() {
     }
 
     @Test
-    void uriWithParams_empty_params() {
+    void uri_with_params_empty_params() {
         // given
         var uri = uri("https://example.com");
         var params = Map.<String, Object>of();
@@ -67,7 +67,7 @@ void uriWithParams_empty_params() {
     }
 
     @Test
-    void uriWithParams_illegalQueryKey_throwsFmpHttpException() {
+    void uri_with_params_illegal_query_key_throws_fmp_http_exception() {
         var uri = URI.create("https:/.com");
         var params = Map.<String, Object>of("param", 42);
 
@@ -79,7 +79,7 @@ void uriWithParams_illegalQueryKey_throwsFmpHttpException() {
     }
 
     @Test
-    void privateConstructor_throwsAssertionError() throws Exception {
+    void private_constructor_throws_assertion_error() throws Exception {
         Constructor<FmpUriUtils> constructor = FmpUriUtils.class.getDeclaredConstructor();
         constructor.setAccessible(true);
 
diff --git a/src/test/java/dev/sorn/fmp4j/json/FmpJsonDeserializerTest.java b/src/test/java/dev/sorn/fmp4j/json/FmpJsonDeserializerTest.java
index 899919cf..510e41ed 100644
--- a/src/test/java/dev/sorn/fmp4j/json/FmpJsonDeserializerTest.java
+++ b/src/test/java/dev/sorn/fmp4j/json/FmpJsonDeserializerTest.java
@@ -12,6 +12,7 @@
 import org.junit.jupiter.api.Test;
 
 class FmpJsonDeserializerTest {
+
     private FmpJsonDeserializer deserializer;
 
     @BeforeEach
@@ -31,10 +32,8 @@ void deserialize_object() {
                 }
             }
             """;
-
         // when
         var obj = deserializer.deserialize(json, typeRef(TestObject.class));
-
         // then
         assertEquals("key", obj.key());
         assertEquals(new TestObjectValue(42), obj.object());
@@ -60,10 +59,8 @@ void deserialize_array() {
                 }
             ]
             """;
-
         // when
         var obj = deserializer.deserialize(json, typeRef(TestObject[].class));
-
         // then
         assertEquals(2, obj.length);
         assertEquals("key3", obj[0].key());
@@ -73,10 +70,9 @@ void deserialize_array() {
     }
 
     @Test
-    void deserialize_object_failsOnMalformedJson() {
+    void deserialize_object_fails_on_malformed_json() {
         // given
         var malformedJson = "{";
-
         // when // then
         var e = assertThrows(
                 FmpDeserializationException.class,
@@ -85,10 +81,9 @@ void deserialize_object_failsOnMalformedJson() {
     }
 
     @Test
-    void deserialize_array_failsOnMalformedJson() {
+    void deserialize_array_fails_on_malformed_json() {
         // given
         var malformedJson = "[";
-
         // when // then
         var e = assertThrows(
                 FmpDeserializationException.class,
@@ -97,7 +92,7 @@ void deserialize_array_failsOnMalformedJson() {
     }
 
     @Test
-    void deserialize_object_failsOnTypeMismatch() {
+    void deserialize_object_fails_on_type_mismatch() {
         // given
         var mismatchedJson =
                 """
@@ -106,7 +101,6 @@ void deserialize_object_failsOnTypeMismatch() {
                 "object": "not_an_object"
             }
             """;
-
         // when // then
         var e = assertThrows(
                 FmpDeserializationException.class,
@@ -123,7 +117,7 @@ void deserialize_object_failsOnTypeMismatch() {
     }
 
     @Test
-    void deserialize_array_failsOnElementTypeMismatch() {
+    void deserialize_array_fails_on_element_type_mismatch() {
         var invalidElementJson =
                 """
             [
@@ -131,7 +125,6 @@ void deserialize_array_failsOnElementTypeMismatch() {
                 {"key": "invalid", "object": "not_an_object"}
             ]
             """;
-
         // when // then
         var e = assertThrows(
                 FmpDeserializationException.class,
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpApiKeyTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpApiKeyTest.java
index a1288fff..14dfd034 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpApiKeyTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpApiKeyTest.java
@@ -32,7 +32,7 @@ void value_returns_raw_value() {
     }
 
     @Test
-    void toString_masked() {
+    void to_string_masked() {
         // given
         var apiKey = new FmpApiKey("ABCDEf0ghIjklmNO1pqRsT2u34VWx5y6");
 
@@ -86,7 +86,7 @@ void invalid_pattern_throws(String value) {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var str = "ABCDEf0ghIjklmNO1pqRsT2u34VWx5y6";
         var k = new FmpApiKey("ABCDEf0ghIjklmNO1pqRsT2u34VWx5y6");
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpCikTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpCikTest.java
index bee6ebd2..cb02d0e8 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpCikTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpCikTest.java
@@ -46,7 +46,7 @@ void is_serializable() throws IOException, ClassNotFoundException {
     }
 
     @Test
-    void toString_returns_value() {
+    void to_string_returns_value() {
         // given
         var c = cik("320193");
 
@@ -58,7 +58,7 @@ void toString_returns_value() {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var str = "0000320193";
         var c = cik("320193");
@@ -135,7 +135,7 @@ void equals_wrong_instance_false() {
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var c1 = cik("320193");
         var c2 = (FmpCik) null;
@@ -146,7 +146,7 @@ void compareTo_null_throws() {
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var c1 = cik("0000000001");
         var c2 = cik("0000000002");
@@ -159,7 +159,7 @@ void compareTo_less_than() {
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var c1 = cik("0000000002");
         var c2 = cik("0000000001");
@@ -172,7 +172,7 @@ void compareTo_greater_than() {
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var c1 = cik("320193");
         var c2 = cik("320193");
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpCurrencyTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpCurrencyTest.java
index d5c51c29..5b1ec204 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpCurrencyTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpCurrencyTest.java
@@ -45,7 +45,7 @@ void is_serializable() throws IOException, ClassNotFoundException {
     }
 
     @Test
-    void toString_returns_value() {
+    void to_string_returns_value() {
         // given
         var c = currency("USD");
 
@@ -57,7 +57,7 @@ void toString_returns_value() {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var str = "USD";
         var c = currency(str);
@@ -134,7 +134,7 @@ void equals_wrong_instance_false() {
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var c1 = currency("USD");
         var c2 = (FmpCurrency) null;
@@ -145,7 +145,7 @@ void compareTo_null_throws() {
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var c1 = currency("EUR");
         var c2 = currency("USD");
@@ -158,7 +158,7 @@ void compareTo_less_than() {
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var c1 = currency("USD");
         var c2 = currency("EUR");
@@ -171,7 +171,7 @@ void compareTo_greater_than() {
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var c1 = currency("USD");
         var c2 = currency("USD");
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpCusipTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpCusipTest.java
index 878b80d9..37239f40 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpCusipTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpCusipTest.java
@@ -45,7 +45,7 @@ void is_serializable() throws IOException, ClassNotFoundException {
     }
 
     @Test
-    void toString_returns_value() {
+    void to_string_returns_value() {
         // given
         var c = cusip("037833100");
 
@@ -57,7 +57,7 @@ void toString_returns_value() {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var str = "037833100";
         var c = cusip(str);
@@ -134,7 +134,7 @@ void equals_wrong_instance_false() {
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var c1 = cusip("037833100");
         var c2 = (FmpCusip) null;
@@ -145,7 +145,7 @@ void compareTo_null_throws() {
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var c1 = cusip("037833100");
         var c2 = cusip("594918104");
@@ -158,7 +158,7 @@ void compareTo_less_than() {
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var c1 = cusip("594918104");
         var c2 = cusip("037833100");
@@ -171,7 +171,7 @@ void compareTo_greater_than() {
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var c1 = cusip("037833100");
         var c2 = cusip("037833100");
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpExchangeTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpExchangeTest.java
index c074d78b..83d12ab3 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpExchangeTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpExchangeTest.java
@@ -131,7 +131,7 @@ void should_not_null_country_code() {
     }
 
     @Test
-    void should_not_null_suffixSymbol() {
+    void should_not_null_suffix_symbol() {
         var nullSuffixSymbol = Arrays.stream(FmpExchange.values())
                 .map(FmpExchange::suffixSymbol)
                 .filter(Objects::isNull)
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpFormTypeTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpFormTypeTest.java
index f16cebc3..29b1e7a3 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpFormTypeTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpFormTypeTest.java
@@ -57,7 +57,7 @@ void is_serializable() throws IOException, ClassNotFoundException {
     }
 
     @Test
-    void toString_returns_value() {
+    void to_string_returns_value() {
         // given
         var s = FORM_10Q;
 
@@ -69,7 +69,7 @@ void toString_returns_value() {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var str = "10-Q";
         var ft = formType(str);
@@ -134,7 +134,7 @@ void equals_wrong_instance_false() {
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var ft1 = FORM_10Q;
         var ft2 = (FmpFormType) null;
@@ -145,7 +145,7 @@ void compareTo_null_throws() {
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var ft1 = FORM_10Q;
         var ft2 = formType("4-K");
@@ -158,7 +158,7 @@ void compareTo_less_than() {
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var ft1 = formType("4-K");
         var ft2 = FORM_10Q;
@@ -171,7 +171,7 @@ void compareTo_greater_than() {
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var ft1 = FORM_10Q;
         var ft2 = FORM_10Q;
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpIndustryTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpIndustryTest.java
index 684ee6aa..29fae6fa 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpIndustryTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpIndustryTest.java
@@ -48,7 +48,7 @@ void testInvalidIndustries(String label) {
 
     // toString test
     @Test
-    void testToString() {
+    void test_to_string() {
         // given
         var industry = FmpIndustry.STEEL;
 
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpIsinTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpIsinTest.java
index fd408a65..5c6f0e19 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpIsinTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpIsinTest.java
@@ -22,11 +22,11 @@
  * @author chat.deepseek.com
  */
 class FmpIsinTest {
+
     @Test
     void null_isin_throws() {
         // given
         var value = (String) null;
-
         // when // then
         var e = assertThrows(FmpInvalidIsinException.class, () -> isin(value));
         assertEquals("'value' is required", e.getMessage());
@@ -36,35 +36,29 @@ void null_isin_throws() {
     void is_serializable() throws IOException, ClassNotFoundException {
         // given
         var before = isin("US0378331005");
-
         // when
         var after = (FmpIsin) deserialize(serialize(before));
-
         // then
         assertEquals(before, after);
     }
 
     @Test
-    void toString_returns_value() {
+    void to_string_returns_value() {
         // given
         var i = isin("US0378331005");
-
         // when
         var str = i.toString();
-
         // then
         assertEquals("US0378331005", str);
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var str = "US0378331005";
         var i = isin(str);
-
         // when
         var hc = i.hashCode();
-
         // then
         assertEquals(str.hashCode(), hc);
     }
@@ -73,10 +67,8 @@ void hashCode_value() {
     void equals_same_true() {
         // given
         var i = isin("US0378331005");
-
         // when
         var eq = i.equals(i);
-
         // then
         assertTrue(eq);
     }
@@ -86,10 +78,8 @@ void equals_identical_true() {
         // given
         var i1 = isin("US0378331005");
         var i2 = isin("US0378331005");
-
         // when
         var eq = i1.equals(i2);
-
         // then
         assertTrue(eq);
     }
@@ -99,10 +89,8 @@ void equals_null_false() {
         // given
         var i1 = isin("US0378331005");
         var i2 = (FmpIsin) null;
-
         // when
         var eq = i1.equals(i2);
-
         // then
         assertFalse(eq);
     }
@@ -112,10 +100,8 @@ void equals_different_false() {
         // given
         var i1 = isin("US0378331005");
         var i2 = isin("US5949181045");
-
         // when
         var eq = i1.equals(i2);
-
         // then
         assertFalse(eq);
     }
@@ -125,69 +111,59 @@ void equals_wrong_instance_false() {
         // given
         var i1 = isin("US0378331005");
         var i2 = "US0378331005";
-
         // when
         var eq = i1.equals(i2);
-
         // then
         assertFalse(eq);
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var i1 = isin("US0378331005");
         var i2 = (FmpIsin) null;
-
         // when // then
         var e = assertThrows(FmpInvalidIsinException.class, () -> i1.compareTo(i2));
         assertEquals("'that.value' is required", e.getMessage());
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var i1 = isin("US0378331005");
         var i2 = isin("US5949181045");
-
         // when
         int cmp = i1.compareTo(i2);
-
         // then
         assertEquals(-5, cmp);
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var i1 = isin("US5949181045");
         var i2 = isin("US0378331005");
-
         // when
         int cmp = i1.compareTo(i2);
-
         // then
         assertEquals(5, cmp);
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var i1 = isin("US0378331005");
         var i2 = isin("US0378331005");
-
         // when
         int cmp = i1.compareTo(i2);
-
         // then
         assertEquals(0, cmp);
     }
 
     @Test
-    void isValidLuhn_covers_both_branches() {
+    void is_valid_luhn_covers_both_branches() {
         var left = isin("US0378331005");
         assertEquals("US0378331005", left.value());
-
         var right = isin("GB00B03MLX29");
         assertEquals("GB00B03MLX29", right.value());
     }
@@ -197,7 +173,6 @@ void isValidLuhn_covers_both_branches() {
     void valid_isins(String value) {
         // given // when
         var isin = isin(value);
-
         // then
         assertEquals(value, isin.value());
     }
@@ -207,7 +182,6 @@ void valid_isins(String value) {
     void invalid_isins(String value) {
         // given // when
         Function<String, FmpIsin> f = FmpIsin::isin;
-
         // then
         var e = assertThrows(FmpInvalidIsinException.class, () -> f.apply(value));
         assertEquals(
@@ -219,7 +193,6 @@ void invalid_isins(String value) {
     void invalid_isins_due_to_check_digit(String value) {
         // given // when
         Function<String, FmpIsin> f = FmpIsin::isin;
-
         // then
         var e = assertThrows(FmpInvalidIsinException.class, () -> f.apply(value));
         assertEquals(format("'value' [%s] has invalid check digit", value), e.getMessage());
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpLimitTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpLimitTest.java
index 4bdaea4f..5d5a8d10 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpLimitTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpLimitTest.java
@@ -57,7 +57,7 @@ void toString_returns_value(int limit) {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var i = 3;
         var lim = limit(i);
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpPageTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpPageTest.java
index a6bf5c20..cb44d241 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpPageTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpPageTest.java
@@ -67,7 +67,7 @@ void toString_returns_value(int page) {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var page = 999;
         var p = page(page);
@@ -139,7 +139,7 @@ void equals_wrong_instance_false() {
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var p1 = page("999");
         var p2 = (FmpPage) null;
@@ -150,7 +150,7 @@ void compareTo_null_throws() {
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var p1 = page("1");
         var p2 = page("999");
@@ -163,7 +163,7 @@ void compareTo_less_than() {
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var p1 = page("999");
         var p2 = page("1");
@@ -176,7 +176,7 @@ void compareTo_greater_than() {
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var p1 = page("1");
         var p2 = page("1");
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpPartTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpPartTest.java
index f70466d4..ea8d461c 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpPartTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpPartTest.java
@@ -67,7 +67,7 @@ void toString_returns_value(int part) {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var part = 999;
         var p = part(part);
@@ -139,7 +139,7 @@ void equals_wrong_instance_false() {
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var p1 = part("999");
         var p2 = (FmpPart) null;
@@ -150,7 +150,7 @@ void compareTo_null_throws() {
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var p1 = part("1");
         var p2 = part("999");
@@ -163,7 +163,7 @@ void compareTo_less_than() {
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var p1 = part("999");
         var p2 = part("1");
@@ -176,7 +176,7 @@ void compareTo_greater_than() {
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var p1 = part("1");
         var p2 = part("1");
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpQuarterTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpQuarterTest.java
index 3ed1a244..9107cd07 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpQuarterTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpQuarterTest.java
@@ -57,7 +57,7 @@ void toString_returns_value(int quarter) {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var quarter = 4;
         var q = quarter(quarter);
@@ -134,7 +134,7 @@ void equals_wrong_instance_false() {
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var q1 = quarter(4);
         var q2 = (FmpQuarter) null;
@@ -145,7 +145,7 @@ void compareTo_null_throws() {
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var q1 = quarter(1);
         var q2 = quarter(2);
@@ -158,7 +158,7 @@ void compareTo_less_than() {
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var q1 = quarter(2);
         var q2 = quarter(1);
@@ -171,7 +171,7 @@ void compareTo_greater_than() {
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var q1 = quarter(1);
         var q2 = quarter(1);
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpSymbolTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpSymbolTest.java
index 082943d1..91724945 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpSymbolTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpSymbolTest.java
@@ -49,7 +49,7 @@ void is_serializable() throws IOException, ClassNotFoundException {
     }
 
     @Test
-    void toString_returns_value() {
+    void to_string_returns_value() {
         // given
         var s = symbol("AAPL");
 
@@ -61,7 +61,7 @@ void toString_returns_value() {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var str = "AAPL";
         var s = symbol(str);
@@ -138,7 +138,7 @@ void equals_wrong_instance_false() {
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var s1 = symbol("AAPL");
         var s2 = (FmpSymbol) null;
@@ -149,7 +149,7 @@ void compareTo_null_throws() {
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var s1 = symbol("A");
         var s2 = symbol("B");
@@ -162,7 +162,7 @@ void compareTo_less_than() {
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var s1 = symbol("B");
         var s2 = symbol("A");
@@ -175,7 +175,7 @@ void compareTo_greater_than() {
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var s1 = symbol("A");
         var s2 = symbol("A");
@@ -214,7 +214,8 @@ void invalid_symbols(String value) {
     @Test
     void check_all_symbols() {
         // How to set up:
-        // 1. Download JSON: https://financialmodelingprep.com/stable/financial-statement-symbol-list?apikey=yourapikey
+        // 1. Download JSON:
+        // https://financialmodelingprep.com/stable/financial-statement-symbol-list?apikey=yourapikey
         // 2. Add it to `testFixtures/resources/stable/financial-statement-symbol-list/full.json`
         // 3. Open the file
         // 4. Replace (CMD+R)
diff --git a/src/test/java/dev/sorn/fmp4j/types/FmpYearTest.java b/src/test/java/dev/sorn/fmp4j/types/FmpYearTest.java
index 745b0012..8e0c0de7 100644
--- a/src/test/java/dev/sorn/fmp4j/types/FmpYearTest.java
+++ b/src/test/java/dev/sorn/fmp4j/types/FmpYearTest.java
@@ -67,7 +67,7 @@ void toString_returns_value(int year) {
     }
 
     @Test
-    void hashCode_value() {
+    void hash_code_value() {
         // given
         var year = 2000;
         var y = year(year);
@@ -144,7 +144,7 @@ void equals_wrong_instance_false() {
     }
 
     @Test
-    void compareTo_null_throws() {
+    void compare_to_null_throws() {
         // given
         var y1 = year("1999");
         var y2 = (FmpYear) null;
@@ -155,7 +155,7 @@ void compareTo_null_throws() {
     }
 
     @Test
-    void compareTo_less_than() {
+    void compare_to_less_than() {
         // given
         var y1 = year("1999");
         var y2 = year("2000");
@@ -168,7 +168,7 @@ void compareTo_less_than() {
     }
 
     @Test
-    void compareTo_greater_than() {
+    void compare_to_greater_than() {
         // given
         var y1 = year("2000");
         var y2 = year("1999");
@@ -181,7 +181,7 @@ void compareTo_greater_than() {
     }
 
     @Test
-    void compareTo_equal() {
+    void compare_to_equal() {
         // given
         var y1 = year("1999");
         var y2 = year("1999");