diff --git a/tests/PathTest.cpp b/tests/PathTest.cpp
index f1894c3..6f9a9e6 100644
--- a/tests/PathTest.cpp
+++ b/tests/PathTest.cpp
@@ -375,6 +375,7 @@
     REPORTER_ASSERT(reporter, !path.cheapComputeDirection(NULL));
     REPORTER_ASSERT(reporter, !path.cheapIsDirection(SkPath::kCW_Direction));
     REPORTER_ASSERT(reporter, !path.cheapIsDirection(SkPath::kCCW_Direction));
+    REPORTER_ASSERT(reporter, path.cheapIsDirection(SkPath::kUnknown_Direction));
 
     static const char* gDegen[] = {
         "M 10 10",