diff --git a/dlls/wtsapi32/tests/wtsapi.c b/dlls/wtsapi32/tests/wtsapi.c
index 396a3f4b1e7..6e8de7b232d 100644
--- a/dlls/wtsapi32/tests/wtsapi.c
+++ b/dlls/wtsapi32/tests/wtsapi.c
@@ -224,7 +224,7 @@ static void test_WTSQuerySessionInformation(void)
     GetUserNameW(usernameW, &tempsize);
     /* Windows Vista, 7 and 8 return uppercase username, while the rest return lowercase. */
     ok(!wcsicmp(buf1, usernameW), "expected %s, got %s\n", wine_dbgstr_w(usernameW), wine_dbgstr_w(buf1));
-    ok(count == tempsize * sizeof(WCHAR), "expected %Iu, got %lu\n", tempsize * sizeof(WCHAR), count);
+    ok(count == tempsize * sizeof(WCHAR), "got %lu\n", count);
     WTSFreeMemory(buf1);
 
     count = 0;
@@ -237,7 +237,7 @@ static void test_WTSQuerySessionInformation(void)
     GetComputerNameW(computernameW, &tempsize);
     /* Windows Vista, 7 and 8 return uppercase computername, while the rest return lowercase. */
     ok(!wcsicmp(buf1, computernameW), "expected %s, got %s\n", wine_dbgstr_w(computernameW), wine_dbgstr_w(buf1));
-    ok(count == (tempsize + 1) * sizeof(WCHAR), "expected %Iu, got %lu\n", (tempsize + 1) * sizeof(WCHAR), count);
+    ok(count == (tempsize + 1) * sizeof(WCHAR), "got %lu\n", count);
     WTSFreeMemory(buf1);
 
     SetLastError(0xdeadbeef);