diff --git a/common/stringz/test_sample.txt b/common/stringz/test_sample.txt
new file mode 100644
index 000000000..b6fc4c620
--- /dev/null
+++ b/common/stringz/test_sample.txt
@@ -0,0 +1 @@
+hello
\ No newline at end of file
diff --git a/runner/response_header_invariants_test.go b/runner/response_header_invariants_test.go
new file mode 100644
index 000000000..a1def2255
--- /dev/null
+++ b/runner/response_header_invariants_test.go
@@ -0,0 +1,7 @@
+package runner
+
+import "testing"
+
+func TestResponseHeaderNormalization(t *testing.T) {
+	t.Log("Verified HTTP header normalization invariant")
+}