Update error message for invalid load label.

--
MOS_MIGRATED_REVID=118662172
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 8e51987..4cc1e94 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
@@ -1142,12 +1142,12 @@
 
   @Test
   public void testInvalidRelativePathBzlExtImplicit() throws Exception {
-    invalidImportTest("file.bzl", SkylarkImports.BZL_EXT_IMPLICIT_MSG);
+    invalidImportTest("file.bzl", SkylarkImports.INVALID_PATH_SYNTAX);
   }
 
   @Test
   public void testInvalidRelativePathNoSubdirs() throws Exception {
-    invalidImportTest("path/to/file", SkylarkImports.RELATIVE_PATH_NO_SUBDIRS_MSG);
+    invalidImportTest("path/to/file", SkylarkImports.INVALID_PATH_SYNTAX);
   }
 
   @Test