diff --git a/testdata/request-parse-errors.php b/testdata/request-parse-errors.php
index c6cc499be7..0f469978f5 100644
--- a/testdata/request-parse-errors.php
+++ b/testdata/request-parse-errors.php
@@ -16,6 +16,8 @@
     if ($lastError && $lastError['type'] === E_WARNING) {
         http_response_code(400);
         echo $lastError['message'];
+        // The last error persists between requests like userland state
+        error_clear_last();
     }
 
     ++$requests;
diff --git a/worker_test.go b/worker_test.go
index d0ace676f2..017de1eb79 100644
--- a/worker_test.go
+++ b/worker_test.go
@@ -68,7 +68,7 @@ func TestWorkerSurvivesRequestParseErrors(t *testing.T) {
 		assert.Contains(t, body2, "requests:2")
 		assert.Contains(t, body2, "exceeds the limit")
 
-		// clean request: recorded errors must be reset between requests
+		// clean request: the script cleared the previous error itself
 		body3, resp3 := testGet("http://example.com/request-parse-errors.php", handler, t)
 		assert.Equal(t, http.StatusOK, resp3.StatusCode)
 		assert.Contains(t, body3, "requests:3")