Clarify parser error for load() statements

RELNOTES: None
PiperOrigin-RevId: 186693205
diff --git a/src/test/java/com/google/devtools/build/lib/syntax/ParserTest.java b/src/test/java/com/google/devtools/build/lib/syntax/ParserTest.java
index 50d6d88..85ffb0e 100644
--- a/src/test/java/com/google/devtools/build/lib/syntax/ParserTest.java
+++ b/src/test/java/com/google/devtools/build/lib/syntax/ParserTest.java
@@ -1221,7 +1221,7 @@
   public void testLoadNoSymbol() throws Exception {
     setFailFast(false);
     parseFileForSkylark("load('/foo/bar/file')\n");
-    assertContainsError("syntax error");
+    assertContainsError("expected at least one symbol to load");
   }
 
   @Test