diff --git a/scripts/validate-fixtures.mjs b/scripts/validate-fixtures.mjs
index 045a8bb..af69e1e 100644
--- a/scripts/validate-fixtures.mjs
+++ b/scripts/validate-fixtures.mjs
@@ -25,11 +25,23 @@ for (const d of destinations) {
 }
 
 for (const [id, score] of Object.entries(scores)) {
-  if (typeof score !== 'number' || score < 0 || score > 100) {
-    errors.push(id + ': score ' + score + ' out of range 0-100');
+  if (typeof score !== 'number' || !Number.isInteger(score) || score < 0 || score > 100) {
+    errors.push(id + ': score ' + score + ' is not an integer in 0–100');
+    continue; // skip band check when score itself is invalid
   }
   if (!destinations.some((d) => d.id === id)) {
     errors.push(id + ': present in scores.json but not in destinations.json');
+    continue;
+  }
+
+  const dest = destinations.find((d) => d.id === id);
+  if (dest && VALID_LABELS.has(dest.label)) {
+    if (!scoreMatchesBand(dest.label, score)) {
+      errors.push(
+        `${id}: score ${score} is outside the expected band for label "${dest.label}" ` +
+        `(expected ${bandRangeLabel(dest.label)})`
+      );
+    }
   }
 }
 
diff --git a/scripts/validate-fixtures.test.mjs b/scripts/validate-fixtures.test.mjs
new file mode 100644
index 0000000..b2d3d1e
--- /dev/null
+++ b/scripts/validate-fixtures.test.mjs
@@ -0,0 +1,200 @@
+/**
+ * Tests for label-to-score-band consistency (issue #62).
+ *
+ * Covers:
+ *  - Boundary values (min and max of each band)
+ *  - Values in intentional gaps (26–39 and 71–74)
+ *  - Values just outside each band edge
+ *  - Mismatched label/score combinations
+ *  - All three valid labels at their boundaries
+ *
+ * Run with:  npm test
+ */
+
+import { describe, it } from 'node:test';
+import assert from 'node:assert/strict';
+import { SCORE_BANDS, scoreMatchesBand, bandRangeLabel } from './validate-fixtures.mjs';
+
+// ---------------------------------------------------------------------------
+// SCORE_BANDS shape
+// ---------------------------------------------------------------------------
+
+describe('SCORE_BANDS', () => {
+  it('exports bands for all three labels', () => {
+    assert.ok(SCORE_BANDS.clean,      'clean band missing');
+    assert.ok(SCORE_BANDS.suspicious, 'suspicious band missing');
+    assert.ok(SCORE_BANDS.malicious,  'malicious band missing');
+  });
+
+  it('clean band is 0–25', () => {
+    assert.equal(SCORE_BANDS.clean.min, 0);
+    assert.equal(SCORE_BANDS.clean.max, 25);
+  });
+
+  it('suspicious band is 40–70', () => {
+    assert.equal(SCORE_BANDS.suspicious.min, 40);
+    assert.equal(SCORE_BANDS.suspicious.max, 70);
+  });
+
+  it('malicious band is 75–100', () => {
+    assert.equal(SCORE_BANDS.malicious.min, 75);
+    assert.equal(SCORE_BANDS.malicious.max, 100);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// bandRangeLabel
+// ---------------------------------------------------------------------------
+
+describe('bandRangeLabel', () => {
+  it('returns "0–25" for clean', () => {
+    assert.equal(bandRangeLabel('clean'), '0–25');
+  });
+  it('returns "40–70" for suspicious', () => {
+    assert.equal(bandRangeLabel('suspicious'), '40–70');
+  });
+  it('returns "75–100" for malicious', () => {
+    assert.equal(bandRangeLabel('malicious'), '75–100');
+  });
+  it('returns "unknown" for an unrecognised label', () => {
+    assert.equal(bandRangeLabel('unknown-label'), 'unknown');
+  });
+});
+
+// ---------------------------------------------------------------------------
+// scoreMatchesBand — clean (0–25)
+// ---------------------------------------------------------------------------
+
+describe('scoreMatchesBand — clean', () => {
+  // Lower boundary
+  it('accepts lower boundary: 0', () => assert.ok(scoreMatchesBand('clean', 0)));
+  it('accepts score 1 (just above lower boundary)', () => assert.ok(scoreMatchesBand('clean', 1)));
+
+  // Upper boundary
+  it('accepts upper boundary: 25', () => assert.ok(scoreMatchesBand('clean', 25)));
+  it('accepts score 24 (just below upper boundary)', () => assert.ok(scoreMatchesBand('clean', 24)));
+
+  // Mid-band values from existing fixtures
+  it('accepts existing fixture score 2', () => assert.ok(scoreMatchesBand('clean', 2)));
+  it('accepts existing fixture score 3', () => assert.ok(scoreMatchesBand('clean', 3)));
+  it('accepts existing fixture score 4', () => assert.ok(scoreMatchesBand('clean', 4)));
+  it('accepts existing fixture score 6', () => assert.ok(scoreMatchesBand('clean', 6)));
+
+  // Just outside upper boundary — intentional gap starts at 26
+  it('rejects score 26 (first value in gap 26–39)', () => assert.ok(!scoreMatchesBand('clean', 26)));
+  it('rejects score 39 (last value in gap 26–39)',  () => assert.ok(!scoreMatchesBand('clean', 39)));
+
+  // Wrong band entirely
+  it('rejects suspicious-range score 55', () => assert.ok(!scoreMatchesBand('clean', 55)));
+  it('rejects malicious-range score 85',  () => assert.ok(!scoreMatchesBand('clean', 85)));
+});
+
+// ---------------------------------------------------------------------------
+// scoreMatchesBand — suspicious (40–70)
+// ---------------------------------------------------------------------------
+
+describe('scoreMatchesBand — suspicious', () => {
+  // Lower boundary
+  it('accepts lower boundary: 40', () => assert.ok(scoreMatchesBand('suspicious', 40)));
+  it('accepts score 41 (just above lower boundary)', () => assert.ok(scoreMatchesBand('suspicious', 41)));
+
+  // Upper boundary
+  it('accepts upper boundary: 70', () => assert.ok(scoreMatchesBand('suspicious', 70)));
+  it('accepts score 69 (just below upper boundary)', () => assert.ok(scoreMatchesBand('suspicious', 69)));
+
+  // Mid-band values from existing fixtures
+  it('accepts existing fixture score 55', () => assert.ok(scoreMatchesBand('suspicious', 55)));
+  it('accepts existing fixture score 58', () => assert.ok(scoreMatchesBand('suspicious', 58)));
+  it('accepts existing fixture score 62', () => assert.ok(scoreMatchesBand('suspicious', 62)));
+
+  // Below lower boundary — gap ends at 39, band starts at 40
+  it('rejects score 39 (last value in gap 26–39)', () => assert.ok(!scoreMatchesBand('suspicious', 39)));
+  it('rejects score 25 (clean upper boundary)',    () => assert.ok(!scoreMatchesBand('suspicious', 25)));
+
+  // Above upper boundary — intentional gap 71–74
+  it('rejects score 71 (first value in gap 71–74)', () => assert.ok(!scoreMatchesBand('suspicious', 71)));
+  it('rejects score 74 (last value in gap 71–74)',  () => assert.ok(!scoreMatchesBand('suspicious', 74)));
+
+  // Wrong band entirely
+  it('rejects clean-range score 10',     () => assert.ok(!scoreMatchesBand('suspicious', 10)));
+  it('rejects malicious-range score 90', () => assert.ok(!scoreMatchesBand('suspicious', 90)));
+});
+
+// ---------------------------------------------------------------------------
+// scoreMatchesBand — malicious (75–100)
+// ---------------------------------------------------------------------------
+
+describe('scoreMatchesBand — malicious', () => {
+  // Lower boundary
+  it('accepts lower boundary: 75', () => assert.ok(scoreMatchesBand('malicious', 75)));
+  it('accepts score 76 (just above lower boundary)', () => assert.ok(scoreMatchesBand('malicious', 76)));
+
+  // Upper boundary
+  it('accepts upper boundary: 100', () => assert.ok(scoreMatchesBand('malicious', 100)));
+  it('accepts score 99 (just below upper boundary)', () => assert.ok(scoreMatchesBand('malicious', 99)));
+
+  // Mid-band values from existing fixtures
+  it('accepts existing fixture score 85', () => assert.ok(scoreMatchesBand('malicious', 85)));
+  it('accepts existing fixture score 89', () => assert.ok(scoreMatchesBand('malicious', 89)));
+  it('accepts existing fixture score 92', () => assert.ok(scoreMatchesBand('malicious', 92)));
+  it('accepts existing fixture score 95', () => assert.ok(scoreMatchesBand('malicious', 95)));
+  it('accepts existing fixture score 97', () => assert.ok(scoreMatchesBand('malicious', 97)));
+
+  // Below lower boundary — gap 71–74 ends at 74, band starts at 75
+  it('rejects score 74 (last value in gap 71–74)', () => assert.ok(!scoreMatchesBand('malicious', 74)));
+  it('rejects score 70 (suspicious upper boundary)', () => assert.ok(!scoreMatchesBand('malicious', 70)));
+
+  // Wrong band entirely
+  it('rejects clean-range score 5',       () => assert.ok(!scoreMatchesBand('malicious', 5)));
+  it('rejects suspicious-range score 60', () => assert.ok(!scoreMatchesBand('malicious', 60)));
+});
+
+// ---------------------------------------------------------------------------
+// Intentional gap values — must fail ALL labels
+// ---------------------------------------------------------------------------
+
+describe('intentional gap values (26–39 and 71–74) are rejected by all labels', () => {
+  for (const gapScore of [26, 30, 35, 39, 71, 72, 73, 74]) {
+    it(`score ${gapScore} is rejected by clean`,      () => assert.ok(!scoreMatchesBand('clean', gapScore)));
+    it(`score ${gapScore} is rejected by suspicious`, () => assert.ok(!scoreMatchesBand('suspicious', gapScore)));
+    it(`score ${gapScore} is rejected by malicious`,  () => assert.ok(!scoreMatchesBand('malicious', gapScore)));
+  }
+});
+
+// ---------------------------------------------------------------------------
+// Cross-label mismatch scenarios (the core issue #62 case)
+// ---------------------------------------------------------------------------
+
+describe('cross-label mismatch detection', () => {
+  it('clean label with a suspicious-range score (55) is rejected', () => {
+    assert.ok(!scoreMatchesBand('clean', 55));
+  });
+  it('clean label with a malicious-range score (90) is rejected', () => {
+    assert.ok(!scoreMatchesBand('clean', 90));
+  });
+  it('suspicious label with a clean-range score (10) is rejected', () => {
+    assert.ok(!scoreMatchesBand('suspicious', 10));
+  });
+  it('suspicious label with a malicious-range score (80) is rejected', () => {
+    assert.ok(!scoreMatchesBand('suspicious', 80));
+  });
+  it('malicious label with a clean-range score (15) is rejected', () => {
+    assert.ok(!scoreMatchesBand('malicious', 15));
+  });
+  it('malicious label with a suspicious-range score (65) is rejected', () => {
+    assert.ok(!scoreMatchesBand('malicious', 65));
+  });
+});
+
+// ---------------------------------------------------------------------------
+// Unknown / invalid label
+// ---------------------------------------------------------------------------
+
+describe('scoreMatchesBand with invalid label', () => {
+  it('returns false for an unknown label', () => {
+    assert.ok(!scoreMatchesBand('unknown', 50));
+  });
+  it('returns false for an empty label', () => {
+    assert.ok(!scoreMatchesBand('', 50));
+  });
+});