Index: libc/test/src/stdlib/DivTest.h
===================================================================
--- libc/test/src/stdlib/DivTest.h
+++ libc/test/src/stdlib/DivTest.h
@@ -32,6 +32,8 @@
   }
 };
 
+#define CAT(A, B) A##B
+
 #define LIST_DIV_TESTS(IntType, ReturnType, func)                              \
   using LlvmLibcDivTest = DivTest<IntType, ReturnType>;                        \
-  TEST_F(LlvmLibcDivTest, SimpleTest) { simpleTest(func); }
+  TEST_F(LlvmLibcDivTest, CAT(SimpleTest, ReturnType)) { simpleTest(func); }