diff --git a/programs/reg/tests/reg.c b/programs/reg/tests/reg.c
index d815d89cfa..e55e1a2853 100644
--- a/programs/reg/tests/reg.c
+++ b/programs/reg/tests/reg.c
@@ -168,6 +168,9 @@ static void test_add(void)
     ok(r == REG_EXIT_SUCCESS, "got exit code %d, expected 0\n", r);
     verify_reg(hkey, "test", REG_SZ, "", 1, TODO_REG_SIZE);
 
+    run_reg_exe("reg add HKCU\\" KEY_BASE " /v test1 /t REG_SZ /f /d", &r);
+    todo_wine ok(r == REG_EXIT_FAILURE, "got exit code %d, expected 1\n", r);
+
     run_reg_exe("reg add HKEY_CURRENT_USER\\" KEY_BASE " /ve /d WineTEST /f", &r);
     ok(r == REG_EXIT_SUCCESS, "got exit code %d, expected 0\n", r);
     verify_reg(hkey, "", REG_SZ, "WineTEST", 9, 0);
@@ -238,6 +241,9 @@ static void test_add(void)
     ok(r == REG_EXIT_SUCCESS, "got exit code %u\n", r);
     verify_reg(hkey, "bin5", REG_BINARY, buffer, 0, 0);
 
+    run_reg_exe("reg add HKCU\\" KEY_BASE " /v bin6 /t REG_BINARY /f /d", &r);
+    todo_wine ok(r == REG_EXIT_FAILURE, "got exit code %d, expected 1\n", r);
+
     /* REG_DWORD */
     run_reg_exe("reg add HKCU\\" KEY_BASE " /t REG_DWORD /f /d 12345678", &r);
     ok(r == REG_EXIT_SUCCESS || broken(r == REG_EXIT_FAILURE /* WinXP */),
@@ -248,6 +254,8 @@ static void test_add(void)
     else
         win_skip("broken reg.exe detected\n");
 
+    run_reg_exe("reg add HKCU\\" KEY_BASE " /v dword0 /t REG_DWORD /f /d", &r);
+    todo_wine ok(r == REG_EXIT_FAILURE, "got exit code %d, expected 1\n", r);
     run_reg_exe("reg add HKCU\\" KEY_BASE " /v dword1 /t REG_DWORD /f", &r);
     todo_wine ok(r == REG_EXIT_FAILURE || broken(r == REG_EXIT_SUCCESS /* WinXP */),
        "got exit code %d, expected 0\n", r);
@@ -344,6 +352,9 @@ static void test_add(void)
     buffer[0]='a'; buffer[1]=0; buffer[2]=0;
     verify_reg(hkey, "multi11", REG_MULTI_SZ, buffer, 3, TODO_REG_SIZE);
 
+    run_reg_exe("reg add HKCU\\" KEY_BASE " /v multi12 /t REG_MULTI_SZ /f /d", &r);
+    todo_wine ok(r == REG_EXIT_FAILURE, "got exit code %d, expected 1\n", r);
+
     RegCloseKey(hkey);
 
     err = RegDeleteKeyA(HKEY_CURRENT_USER, KEY_BASE);