diff --git a/test/skill-e2e.test.ts b/test/skill-e2e.test.ts
index 2e576e5d..aac7c452 100644
--- a/test/skill-e2e.test.ts
+++ b/test/skill-e2e.test.ts
@@ -2770,14 +2770,18 @@ Output the diagram directly.`,
 
     // Check output contains coverage diagram elements
     const output = result.output || '';
-    const hasGap = output.includes('GAP') || output.includes('gap') || output.includes('NO TEST');
-    const hasTested = output.includes('TESTED') || output.includes('tested') || output.includes('✓');
-    const hasCoverage = output.includes('COVERAGE') || output.includes('coverage') || output.includes('paths tested');
+    const outputLower = output.toLowerCase();
+    const hasGap = outputLower.includes('gap') || outputLower.includes('no test');
+    const hasTested = outputLower.includes('tested') || output.includes('✓') || output.includes('★');
+    const hasCoverage = outputLower.includes('coverage') || outputLower.includes('paths tested');
 
     console.log(`Output has GAP markers: ${hasGap}`);
     console.log(`Output has TESTED markers: ${hasTested}`);
     console.log(`Output has coverage summary: ${hasCoverage}`);
 
+    // The agent MUST produce a coverage diagram with gap and tested markers
+    expect(hasGap || hasTested).toBe(true);
+
     // At minimum, the agent should have read the source and test files
     const readCalls = result.toolCalls.filter(tc => tc.tool === 'Read');
     expect(readCalls.length).toBeGreaterThan(0);
@@ -2836,14 +2840,18 @@ Output the diagram directly.`,
 
     // Check output contains coverage diagram elements
     const output = result.output || '';
-    const hasGap = output.includes('GAP') || output.includes('gap') || output.includes('NO TEST');
-    const hasTested = output.includes('TESTED') || output.includes('tested') || output.includes('✓');
-    const hasCoverage = output.includes('COVERAGE') || output.includes('coverage') || output.includes('paths tested');
+    const outputLower = output.toLowerCase();
+    const hasGap = outputLower.includes('gap') || outputLower.includes('no test');
+    const hasTested = outputLower.includes('tested') || output.includes('✓') || output.includes('★');
+    const hasCoverage = outputLower.includes('coverage') || outputLower.includes('paths tested');
 
     console.log(`Output has GAP markers: ${hasGap}`);
     console.log(`Output has TESTED markers: ${hasTested}`);
     console.log(`Output has coverage summary: ${hasCoverage}`);
 
+    // The agent MUST produce a coverage diagram with gap and tested markers
+    expect(hasGap || hasTested).toBe(true);
+
     // At minimum, the agent should have read the source and test files
     const readCalls = result.toolCalls.filter(tc => tc.tool === 'Read');
     expect(readCalls.length).toBeGreaterThan(0);