diff --git a/test/suites/api/test_pack.c b/test/suites/api/test_pack.c
index 7e037e4..c7e7251 100644
--- a/test/suites/api/test_pack.c
+++ b/test/suites/api/test_pack.c
@@ -25,7 +25,7 @@ static void run_tests()
     value = json_pack("b", 1);
     if(!json_is_true(value))
         fail("json_pack boolean failed");
-    if(value->refcount != (ssize_t)-1)
+    if(value->refcount != (size_t)-1)
         fail("json_pack boolean refcount failed");
     json_decref(value);
 
@@ -33,7 +33,7 @@ static void run_tests()
     value = json_pack("b", 0);
     if(!json_is_false(value))
         fail("json_pack boolean failed");
-    if(value->refcount != (ssize_t)-1)
+    if(value->refcount != (size_t)-1)
         fail("json_pack boolean refcount failed");
     json_decref(value);
 
@@ -41,7 +41,7 @@ static void run_tests()
     value = json_pack("n");
     if(!json_is_null(value))
         fail("json_pack null failed");
-    if(value->refcount != (ssize_t)-1)
+    if(value->refcount != (size_t)-1)
         fail("json_pack null refcount failed");
     json_decref(value);
 
@@ -49,7 +49,7 @@ static void run_tests()
     value = json_pack("i", 1);
     if(!json_is_integer(value) || json_integer_value(value) != 1)
         fail("json_pack integer failed");
-    if(value->refcount != (ssize_t)1)
+    if(value->refcount != (size_t)1)
         fail("json_pack integer refcount failed");
     json_decref(value);
 
@@ -57,7 +57,7 @@ static void run_tests()
     value = json_pack("I", (json_int_t)555555);
     if(!json_is_integer(value) || json_integer_value(value) != 555555)
         fail("json_pack json_int_t failed");
-    if(value->refcount != (ssize_t)1)
+    if(value->refcount != (size_t)1)
         fail("json_pack integer refcount failed");
     json_decref(value);
 
@@ -65,7 +65,7 @@ static void run_tests()
     value = json_pack("f", 1.0);
     if(!json_is_real(value) || json_real_value(value) != 1.0)
         fail("json_pack real failed");
-    if(value->refcount != (ssize_t)1)
+    if(value->refcount != (size_t)1)
         fail("json_pack real refcount failed");
     json_decref(value);
 
@@ -73,7 +73,7 @@ static void run_tests()
     value = json_pack("s", "test");
     if(!json_is_string(value) || strcmp("test", json_string_value(value)))
         fail("json_pack string failed");
-    if(value->refcount != (ssize_t)1)
+    if(value->refcount != (size_t)1)
         fail("json_pack string refcount failed");
     json_decref(value);
 
@@ -81,7 +81,7 @@ static void run_tests()
     value = json_pack("{}", 1.0);
     if(!json_is_object(value) || json_object_size(value) != 0)
         fail("json_pack empty object failed");
-    if(value->refcount != (ssize_t)1)
+    if(value->refcount != (size_t)1)
         fail("json_pack empty object refcount failed");
     json_decref(value);
 
@@ -89,7 +89,7 @@ static void run_tests()
     value = json_pack("[]", 1.0);
     if(!json_is_array(value) || json_array_size(value) != 0)
         fail("json_pack empty list failed");
-    if(value->refcount != (ssize_t)1)
+    if(value->refcount != (size_t)1)
         fail("json_pack empty list failed");
     json_decref(value);
 
@@ -97,7 +97,7 @@ static void run_tests()
     value = json_pack("o", json_integer(1));
     if(!json_is_integer(value) || json_integer_value(value) != 1)
         fail("json_pack object failed");
-    if(value->refcount != (ssize_t)1)
+    if(value->refcount != (size_t)1)
         fail("json_pack integer refcount failed");
     json_decref(value);
 
@@ -105,7 +105,7 @@ static void run_tests()
     value = json_pack("O", json_integer(1));
     if(!json_is_integer(value) || json_integer_value(value) != 1)
         fail("json_pack object failed");
-    if(value->refcount != (ssize_t)2)
+    if(value->refcount != (size_t)2)
         fail("json_pack integer refcount failed");
     json_decref(value);
     json_decref(value);
@@ -116,7 +116,7 @@ static void run_tests()
         fail("json_pack array failed");
     if(!json_is_array(json_object_get(value, "foo")))
         fail("json_pack array failed");
-    if(json_object_get(value, "foo")->refcount != (ssize_t)1)
+    if(json_object_get(value, "foo")->refcount != (size_t)1)
         fail("json_pack object refcount failed");
     json_decref(value);