diff --git a/crc32/test.c b/crc32/test.c
index b3778d1..6d11be8 100644
--- a/crc32/test.c
+++ b/crc32/test.c
@@ -1,4 +1,5 @@
 #include "crc32.h"
+#include "crc32_nolookup.h"
 #include <assert.h>
 #include <stdio.h>
 
@@ -19,6 +20,14 @@ int main(void) {
     assert(crc == crc32("a", 1));
     assert(crc == 0xE8B7BE43);
 
+    assert(crc32_ieee("123456789", 9) == 0xCBF43926);
+    assert(crc32_ieee("", 0) == 0x00000000);
+    assert(crc32_ieee("a", 1) == 0xE8B7BE43);
+    assert(crc32_ieee("A", 1) == 0xD3D99E8B);
+    assert(crc32_ieee("hello", 5) == 0x3610A686);
+    assert(crc32_ieee("The quick brown fox jumps over the lazy dog", 43) == 0x414FA339);
+    assert(crc32_ieee("The quick brown fox jumps over the lazy dog.", 44) == 0x519025E9);
+
     printf("All good!\n");
     return 0;
 }