diff --git a/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/CMakeFiles/CMakeScratch/TryCompile-abcdef/CheckFunctionExists.c b/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/CMakeFiles/CMakeScratch/TryCompile-abcdef/CheckFunctionExists.c
index 1a23bb6dec52..ab5a8cc27f0a 100644
--- a/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/CMakeFiles/CMakeScratch/TryCompile-abcdef/CheckFunctionExists.c	
+++ b/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/CMakeFiles/CMakeScratch/TryCompile-abcdef/CheckFunctionExists.c	
@@ -3,6 +3,6 @@ typedef long long size_t;
 size_t strlen(const char *s);
 
 int main() {
-  strlen("");
+  strlen(""); // GOOD: the source file occurs in a `CMakeFiles/CMakeScratch/TryCompile-...` directory
   return 0;
 }