The meaning "来週テスト" is often used as a casual or abbreviated meaning among the general Japanese population, often in the sense of "来週テストがある"The correct grammar is "来週 、　テストがある" or "来週 はテストがある"

This is very difficult for even native speakers to understand sometimes.

The meaning "来週テスト" is often used as a casual or abbreviated meaning among the general Japanese population, often in the sense of "来週テストがある"The correct grammar is "来週 、　テストがある" or "来週 はテストがある"

来週のテスト means (a test that is next week). Or next week's test

This is very difficult for even native speakers to understand sometimes.

The meaning "来週テスト" is often used as a casual or abbreviated meaning among the general Japanese population, often in the sense of "来週テストがある"The correct grammar is "来週 、　テストがある" or "来週 はテストがある" but many Japanese often omit punctuation and "て、に、お、は" in their daily conversation in this way.

This is very difficult for even native speakers to understand sometimes.

The meaning "来週テスト" is often used as a casual or abbreviated meaning among the general Japanese population, often in the sense of "来週テストがある"The correct grammar is "来週 、　テストがある" or "来週 はテストがある"

This is very difficult for even native speakers to understand sometimes.