diff --git a/src/test/abilities/competitive.test.ts b/src/test/abilities/competitive.test.ts
new file mode 100644
index 00000000000..6598ba97a6a
--- /dev/null
+++ b/src/test/abilities/competitive.test.ts
@@ -0,0 +1,46 @@
+import { Stat } from "#enums/stat";
+import { TurnInitPhase } from "#app/phases/turn-init-phase";
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Competitive", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+
+    game.override.battleType("single")
+      .enemySpecies(Species.RATTATA)
+      .enemyMoveset(Moves.TICKLE)
+      .startingLevel(100)
+      .moveset(Moves.SPLASH)
+      .ability(Abilities.COMPETITIVE);
+  });
+
+  it("lower atk and def by 1 via tickle, then increase spatk by 4 via competitive", async () => {
+    await game.classicMode.startBattle([ Species.FLYGON ]);
+
+    const playerPokemon = game.scene.getPlayerPokemon()!;
+    game.move.select(Moves.SPLASH);
+    await game.phaseInterceptor.to(TurnInitPhase);
+
+    expect(playerPokemon.getStatStage(Stat.ATK)).toBe(-1);
+    expect(playerPokemon.getStatStage(Stat.DEF)).toBe(-1);
+    expect(playerPokemon.getStatStage(Stat.SPATK)).toBe(4);
+  });
+});