Update tests to use the label-based load() syntax.

RELNOTES: None.
PiperOrigin-RevId: 177487913
diff --git a/src/test/java/com/google/devtools/build/lib/pkgcache/IncrementalLoadingTest.java b/src/test/java/com/google/devtools/build/lib/pkgcache/IncrementalLoadingTest.java
index 4aac924..49e5be4 100644
--- a/src/test/java/com/google/devtools/build/lib/pkgcache/IncrementalLoadingTest.java
+++ b/src/test/java/com/google/devtools/build/lib/pkgcache/IncrementalLoadingTest.java
@@ -385,7 +385,7 @@
   @Test
   public void testChangedExternalFile() throws Exception {
     tester.addFile("a/BUILD",
-        "load('/a/b', 'b')",
+        "load('//a:b.bzl', 'b')",
         "b()");
 
     tester.addFile("/b.bzl",