diff --git a/tddai/coverage_analyzer.py b/tddai/coverage_analyzer.py
index ecde2647..6790e6ac 100644
--- a/tddai/coverage_analyzer.py
+++ b/tddai/coverage_analyzer.py
@@ -353,8 +353,15 @@ class CoverageAnalyzer:
 
         # Get all covered keywords
         covered_keywords = set()
+        issue_related_tests = []
         for test in existing_tests:
-            covered_keywords.update(test.coverage_keywords)
+            if test.related_issue:  # Only count tests specifically for this issue
+                covered_keywords.update(test.coverage_keywords)
+                issue_related_tests.append(test)
+
+        # If no issue-specific tests found, coverage should be 0%
+        if not issue_related_tests:
+            return 0.0
 
         # Check coverage for each requirement
         for requirement in requirements: