diff --git a/lldb/test/lldbtest.py b/lldb/test/lldbtest.py
index 51d2afd534ecd0bd5c9e58d53b0c43684ee69b09..40a8903bda9095b4efea4420c457d9b7727aa0db 100644
--- a/lldb/test/lldbtest.py
+++ b/lldb/test/lldbtest.py
@@ -458,6 +458,12 @@ class TestBase(unittest2.TestCase):
             # End of while loop.
 
 
+    def buildDefault(self):
+        """Platform specific way to build the default binaries."""
+        module = __import__(sys.platform)
+        if not module.buildDefault():
+            raise Exception("Don't know how to build default binary")
+
     def buildDsym(self):
         """Platform specific way to build binaries with dsym info."""
         module = __import__(sys.platform)
diff --git a/lldb/test/macosx/universal/TestUniversal.py b/lldb/test/macosx/universal/TestUniversal.py
index 6a93e4aa714d499cb7fb167ced1cef4667af8268..7785f63a11f74b0d1fb83f8742bb9feed918481d 100644
--- a/lldb/test/macosx/universal/TestUniversal.py
+++ b/lldb/test/macosx/universal/TestUniversal.py
@@ -9,9 +9,14 @@ class UniversalTestCase(TestBase):
 
     mydir = "macosx/universal"
 
+    @unittest2.skipUnless(sys.platform.startswith("darwin") and os.uname()[4]=='i386',
+                          "requires Darwin & i386")
     def test_process_launch_for_universal(self):
         """Test process launch of a universal binary."""
 
+        # Invoke the default build rule.
+        self.buildDefault()
+
         # Note that "testit" is a universal binary.
         exe = os.path.join(os.getcwd(), "testit")
 
diff --git a/lldb/test/plugins/darwin.py b/lldb/test/plugins/darwin.py
index 6a2cadfe3b9928286fcc4d5a11bfd1eceb5dec61..f5a6ee07542fca116668cfe924f3b5c048fea26f 100644
--- a/lldb/test/plugins/darwin.py
+++ b/lldb/test/plugins/darwin.py
@@ -2,6 +2,12 @@ import lldbtest
 
 #print "Hello, darwin plugin!"
 
+def buildDefault():
+    lldbtest.system(["/bin/sh", "-c", "make clean; make"])
+
+    # True signifies that we can handle building default.
+    return True
+
 def buildDsym():
     lldbtest.system(["/bin/sh", "-c", "make clean; make MAKE_DSYM=YES"])