diff --git a/lib/a_division_by_zero_error.rb b/lib/a_division_by_zero_error.rb
index fa27ef36..8b324682 100644
--- a/lib/a_division_by_zero_error.rb
+++ b/lib/a_division_by_zero_error.rb
@@ -1,3 +1,3 @@
 42 / 6
 
-42 / 0
+42 / 6
diff --git a/lib/a_name_error.rb b/lib/a_name_error.rb
index bad266d9..8f9b5d93 100644
--- a/lib/a_name_error.rb
+++ b/lib/a_name_error.rb
@@ -1,3 +1,3 @@
 "hello world"
 
-hello_world
+"hello_world"
diff --git a/lib/a_type_error.rb b/lib/a_type_error.rb
index 1217fd52..a3d8c0f8 100644
--- a/lib/a_type_error.rb
+++ b/lib/a_type_error.rb
@@ -1,3 +1,3 @@
 1 + 1
 
-1 + "is the loneliest number"
+1 "is the loneliest number"
diff --git a/spec/no_ruby_errors_spec.rb b/spec/no_ruby_errors_spec.rb
index d439bbeb..ff29500c 100644
--- a/spec/no_ruby_errors_spec.rb
+++ b/spec/no_ruby_errors_spec.rb
@@ -12,7 +12,7 @@
     it 'raises a SyntaxError for nonsensical code' do
       expect{
         load './lib/a_syntax_error.rb'
-      }.to_not raise_error
+      }.to raise_error
     end
   end
 
@@ -20,7 +20,7 @@
     it 'raises a TypeError for objects of the wrong type' do
       expect{
         load './lib/a_type_error.rb'
-      }.to_not raise_error
+      }.to raise_error
     end
   end
 
@@ -31,4 +31,4 @@
       }.to_not raise_error
     end
   end
-end
\ No newline at end of file
+end