diff --git a/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcRuleTestCase.java b/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcRuleTestCase.java
index 3ffb89adf429ba..14c2478a24d110 100644
--- a/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcRuleTestCase.java
+++ b/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcRuleTestCase.java
@@ -242,9 +242,7 @@ private static String compilationModeFlag(CompilationMode mode) {
   protected static ImmutableList<String> compilationModeCopts(CompilationMode mode) {
     switch (mode) {
       case DBG:
-        return ImmutableList.<String>builder()
-            .addAll(ObjcConfiguration.DBG_COPTS)
-            .build();
+        return ImmutableList.copyOf(ObjcConfiguration.DBG_COPTS);
       case OPT:
         return ObjcConfiguration.OPT_COPTS;
       case FASTBUILD: