diff --git a/llvm/unittests/ADT/BitVectorTest.cpp b/llvm/unittests/ADT/BitVectorTest.cpp
index dc298a8..f97be22 100644
--- a/llvm/unittests/ADT/BitVectorTest.cpp
+++ b/llvm/unittests/ADT/BitVectorTest.cpp
@@ -141,6 +141,14 @@
   EXPECT_TRUE(Vec.none());
   EXPECT_FALSE(Vec.empty());
 
+  Vec.flip();
+  EXPECT_EQ(130U, Vec.count());
+  EXPECT_EQ(130U, Vec.size());
+  EXPECT_TRUE(Vec.any());
+  EXPECT_TRUE(Vec.all());
+  EXPECT_FALSE(Vec.none());
+  EXPECT_FALSE(Vec.empty());
+
   Inv = TypeParam().flip();
   EXPECT_EQ(0U, Inv.count());
   EXPECT_EQ(0U, Inv.size());