diff --git a/libc/test/src/string/strlcpy_test.cpp b/libc/test/src/string/strlcpy_test.cpp
--- a/libc/test/src/string/strlcpy_test.cpp
+++ b/libc/test/src/string/strlcpy_test.cpp
@@ -13,17 +13,17 @@
 TEST(LlvmLibcStrlcpyTest, TooBig) {
   const char *str = "abc";
   char buf[2];
-  EXPECT_EQ(__llvm_libc::strlcpy(buf, str, 2), 3ul);
+  EXPECT_EQ(__llvm_libc::strlcpy(buf, str, 2), size_t(3));
   EXPECT_STREQ(buf, "a");
 
-  EXPECT_EQ(__llvm_libc::strlcpy(nullptr, str, 0), 3ul);
+  EXPECT_EQ(__llvm_libc::strlcpy(nullptr, str, 0), size_t(3));
 }
 
 TEST(LlvmLibcStrlcpyTest, Smaller) {
   const char *str = "abc";
   char buf[7]{"111111"};
 
-  EXPECT_EQ(__llvm_libc::strlcpy(buf, str, 7), 3ul);
+  EXPECT_EQ(__llvm_libc::strlcpy(buf, str, 7), size_t(3));
   EXPECT_STREQ(buf, "abc");
   for (const char *p = buf + 3; p < buf + 7; p++)
     EXPECT_EQ(*p, '\0');