diff --git a/tests/XfermodeTest.cpp b/tests/XfermodeTest.cpp
index 6ab6cd7..b552ce0 100644
--- a/tests/XfermodeTest.cpp
+++ b/tests/XfermodeTest.cpp
@@ -6,16 +6,27 @@
     return 42;
 }
 
+#define ILLEGAL_MODE    ((SkXfermode::Mode)-1)
+
 static void test_asMode(skiatest::Reporter* reporter) {
     for (int mode = 0; mode <= SkXfermode::kLastMode; mode++) {
         SkXfermode* xfer = SkXfermode::Create((SkXfermode::Mode) mode);
-        SkXfermode::Mode reportedMode = (SkXfermode::Mode) -1;
-        REPORTER_ASSERT(reporter,
-                        xfer != NULL || mode == SkXfermode::kSrcOver_Mode);
+
+        SkXfermode::Mode reportedMode = ILLEGAL_MODE;
+        REPORTER_ASSERT(reporter, reportedMode != mode);
+
+        // test IsMode
+        REPORTER_ASSERT(reporter, SkXfermode::IsMode(xfer, &reportedMode));
+        REPORTER_ASSERT(reporter, reportedMode == mode);
+
+        // repeat that test, but with asMode instead
         if (xfer) {
-          REPORTER_ASSERT(reporter, xfer->asMode(&reportedMode));
-          REPORTER_ASSERT(reporter, reportedMode == mode);
-          xfer->unref();
+            reportedMode = (SkXfermode::Mode) -1;
+            REPORTER_ASSERT(reporter, xfer->asMode(&reportedMode));
+            REPORTER_ASSERT(reporter, reportedMode == mode);
+            xfer->unref();
+        } else {
+            REPORTER_ASSERT(reporter, SkXfermode::kSrcOver_Mode == mode); 
         }
     }
 
@@ -23,6 +34,8 @@
     SkXfermode::Mode reportedMode = (SkXfermode::Mode) -1;
     REPORTER_ASSERT(reporter, !bogusXfer->asMode(&reportedMode));
     REPORTER_ASSERT(reporter, reportedMode == -1);
+    REPORTER_ASSERT(reporter, !SkXfermode::IsMode(bogusXfer, &reportedMode));
+    REPORTER_ASSERT(reporter, reportedMode == -1);
     bogusXfer->unref();
 }