diff --git a/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/meson-private/tmp_abc/ExprHasNoEffect.expected b/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/meson-private/tmp_abc/ExprHasNoEffect.expected
new file mode 100644
index 00000000000..1f2c9410da1
--- /dev/null
+++ b/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/meson-private/tmp_abc/ExprHasNoEffect.expected	
@@ -0,0 +1 @@
+| testfile.c:6:3:6:8 | call to strlen | This expression has no effect (because $@ has no external side effects). | testfile.c:3:8:3:13 | strlen | strlen |
diff --git a/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/meson-private/tmp_abc/ExprHasNoEffect.qlref b/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/meson-private/tmp_abc/ExprHasNoEffect.qlref
new file mode 100644
index 00000000000..82a90f5413a
--- /dev/null
+++ b/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/meson-private/tmp_abc/ExprHasNoEffect.qlref	
@@ -0,0 +1 @@
+Likely Bugs/Likely Typos/ExprHasNoEffect.ql
diff --git a/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/meson-private/tmp_abc/testfile.c b/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/meson-private/tmp_abc/testfile.c
new file mode 100644
index 00000000000..fef0dff82a5
--- /dev/null
+++ b/cpp/ql/test/query-tests/Likely Bugs/Likely Typos/ExprHasNoEffect/meson-private/tmp_abc/testfile.c	
@@ -0,0 +1,8 @@
+typedef long long size_t;
+
+size_t strlen(const char *s);
+
+int main() {
+  strlen(""); // GOOD: the source file occurs in a `meson-private/tmp.../testfile.c` directory
+  return 0;
+}