diff -r 61d5197d612b -r 4523f6d42512 tests/test_compare.cpp
--- a/tests/test_compare.cpp	Mon Dec 18 15:13:26 2023 +0100
+++ b/tests/test_compare.cpp	Mon Dec 18 16:04:21 2023 +0100
@@ -125,3 +125,13 @@
 TEST(Compare, UintPtr) {
     test_compare<uintptr_t>(cx_cmp_uintptr);
 }
+
+TEST(Compare, Ptr) {
+    int data[3];
+    EXPECT_EQ(0, cx_cmp_ptr(data, data));
+    EXPECT_EQ(-1, cx_cmp_ptr(&data[0], &data[1]));
+    EXPECT_EQ(-1, cx_cmp_ptr(&data[1], &data[2]));
+    EXPECT_EQ(1, cx_cmp_ptr(&data[2], &data[1]));
+    EXPECT_EQ(1, cx_cmp_ptr(&data[1], data));
+    EXPECT_EQ(0, cx_cmp_ptr(&data[1], &data[1]));
+}