diff --git a/dlls/advapi32/tests/registry.c b/dlls/advapi32/tests/registry.c
index ca82fa13186..71317c4bd9b 100644
--- a/dlls/advapi32/tests/registry.c
+++ b/dlls/advapi32/tests/registry.c
@@ -956,15 +956,12 @@ static void test_reg_open_key(void)
     RegCloseKey(hkResult);
 
     /* send in NULL hkResult */
-    SetLastError(0xdeadbeef);
     ret = RegOpenKeyA(HKEY_CURRENT_USER, "Software\\Wine\\Test", NULL);
     ok(ret == ERROR_INVALID_PARAMETER, "expected ERROR_INVALID_PARAMETER, got %d\n", ret);
 
-    SetLastError(0xdeadbeef);
     ret = RegOpenKeyA(HKEY_CURRENT_USER, NULL, NULL);
     ok(ret == ERROR_INVALID_PARAMETER, "expected ERROR_INVALID_PARAMETER, got %d\n", ret);
 
-    SetLastError(0xdeadbeef);
     ret = RegOpenKeyA(NULL, NULL, NULL);
     ok(ret == ERROR_INVALID_PARAMETER, "expected ERROR_INVALID_PARAMETER, got %d\n", ret);