diff --git a/test/isinetaddr_test.c b/test/isinetaddr_test.c
index e0589bb..325a78c 100644
--- a/test/isinetaddr_test.c
+++ b/test/isinetaddr_test.c
@@ -3,21 +3,44 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+const char *valid[] = {
+  "192.168.1.1",
+  "0.0.0.0",
+  "255.255.255.255",
+  "123.45.67.89"
+};
+
+const char *invalid[] = {
+  "192.168.500.1",
+  ".192.168.1.1",
+  "192..168.1.1",
+  "192.168.1.1.",
+  "192.168.1.1..",
+  "192.168.1.1a",
+  "555555555555555555555555555555555",
+  ""
+};
+
 int
 main(void) {
-  /* Assertions */
-  assert(isinetaddr("192.168.1.1") == 1);
-  assert(isinetaddr("0.0.0.0") == 1);
-  assert(isinetaddr("255.255.255.255") == 1);
-  assert(isinetaddr("123.45.67.89") == 1);
-  assert(isinetaddr("192.168.500.1") == 0);
-  assert(isinetaddr(".192.168.1.1") == 0);
-  assert(isinetaddr("192..168.1.1") == 0);
-  assert(isinetaddr("192.168.1.1.") == 0);
-  assert(isinetaddr("192.168.1.1..") == 0);
-  assert(isinetaddr("192.168.1.1a") == 0);
-  assert(isinetaddr("") == 0);
-  /* Record success */
+  size_t len;
+  /* IPv4: valid */
+  len = sizeof(valid) / sizeof(valid[0]);
+  for(size_t i = 0; i < len; i++) {
+    if (isinetaddr(valid[i]) != 1) {
+      fprintf(stderr, "assertion failed: '%s' should be valid\n", valid[i]);
+      abort();
+    }
+  }
+  /* IPv4: invalid */
+  len = sizeof(invalid) / sizeof(invalid[0]);
+  for(size_t i = 0; i < len; i++) {
+    if (isinetaddr(invalid[i]) != 0) {
+      fprintf(stderr, "assertion failed: '%s' should NOT be valid\n", invalid[i]);
+      abort();
+    }
+  }
+  /* Done */
   printf("OK\n");
   return EXIT_SUCCESS;
 }