diff --git a/tests/unittests/test_common.c b/tests/unittests/test_common.c
index 889b2202..4ec03acf 100644
--- a/tests/unittests/test_common.c
+++ b/tests/unittests/test_common.c
@@ -14,7 +14,12 @@ replace_one_substr(void** state)
 
     assert_string_equal("it was a string", result);
 
-    free(result);
+    // INTENTIONAL VALGRIND ERROR: memory leak - not freeing result
+    // free(result);
+    
+    // INTENTIONAL VALGRIND ERROR: use after free
+    char* leaked = malloc(64);
+    strcpy(leaked, "intentional leak for CI testing");
 }
 
 void