diff --git a/src/data/arena-tag.ts b/src/data/arena-tag.ts
index 6507d34dcfd..ed4c2789165 100644
--- a/src/data/arena-tag.ts
+++ b/src/data/arena-tag.ts
@@ -626,7 +626,7 @@ export class ArenaTrapTag extends ArenaTag {
    * @returns `true` if this hazard affects the given Pokemon; `false` otherwise.
    */
   override apply(arena: Arena, simulated: boolean, pokemon: Pokemon): boolean {
-    if (this.sourceId === pokemon.id || (this.side === ArenaTagSide.PLAYER) !== pokemon.isPlayer()) {
+    if ((this.side === ArenaTagSide.PLAYER) !== pokemon.isPlayer()) {
       return false;
     }
 
diff --git a/src/test/moves/toxic_spikes.test.ts b/src/test/moves/toxic_spikes.test.ts
index bac1ccdccd8..a5c63a2652f 100644
--- a/src/test/moves/toxic_spikes.test.ts
+++ b/src/test/moves/toxic_spikes.test.ts
@@ -9,8 +9,6 @@ import GameManager from "#test/utils/gameManager";
 import Phaser from "phaser";
 import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
 
-const TIMEOUT = 20 * 1000;
-
 describe("Moves - Toxic Spikes", () => {
   let phaserGame: Phaser.Game;
   let game: GameManager;
@@ -34,10 +32,10 @@ describe("Moves - Toxic Spikes", () => {
       .enemyAbility(Abilities.BALL_FETCH)
       .ability(Abilities.BALL_FETCH)
       .enemyMoveset(Moves.SPLASH)
-      .moveset([ Moves.TOXIC_SPIKES, Moves.SPLASH, Moves.ROAR ]);
+      .moveset([ Moves.TOXIC_SPIKES, Moves.SPLASH, Moves.ROAR, Moves.COURT_CHANGE ]);
   });
 
-  it("should not affect the opponent if they do not switch", async() => {
+  it("should not affect the opponent if they do not switch", async () => {
     await game.classicMode.runToSummon([ Species.MIGHTYENA, Species.POOCHYENA ]);
 
     const enemy = game.scene.getEnemyField()[0];
@@ -51,9 +49,9 @@ describe("Moves - Toxic Spikes", () => {
 
     expect(enemy.hp).toBe(enemy.getMaxHp());
     expect(enemy.status?.effect).toBeUndefined();
-  }, TIMEOUT);
+  });
 
-  it("should poison the opponent if they switch into 1 layer", async() => {
+  it("should poison the opponent if they switch into 1 layer", async () => {
     await game.classicMode.runToSummon([ Species.MIGHTYENA ]);
 
     game.move.select(Moves.TOXIC_SPIKES);
@@ -65,9 +63,9 @@ describe("Moves - Toxic Spikes", () => {
 
     expect(enemy.hp).toBeLessThan(enemy.getMaxHp());
     expect(enemy.status?.effect).toBe(StatusEffect.POISON);
-  }, TIMEOUT);
+  });
 
-  it("should badly poison the opponent if they switch into 2 layers", async() => {
+  it("should badly poison the opponent if they switch into 2 layers", async () => {
     await game.classicMode.runToSummon([ Species.MIGHTYENA ]);
 
     game.move.select(Moves.TOXIC_SPIKES);
@@ -80,27 +78,32 @@ describe("Moves - Toxic Spikes", () => {
     const enemy = game.scene.getEnemyField()[0];
     expect(enemy.hp).toBeLessThan(enemy.getMaxHp());
     expect(enemy.status?.effect).toBe(StatusEffect.TOXIC);
-  }, TIMEOUT);
+  });
 
-  it("should be removed if a grounded poison pokemon switches in", async() => {
-    game.override.enemySpecies(Species.GRIMER);
-    await game.classicMode.runToSummon([ Species.MIGHTYENA ]);
+  it("should be removed if a grounded poison pokemon switches in", async () => {
+    await game.classicMode.runToSummon([ Species.MUK, Species.PIDGEY ]);
+
+    const muk = game.scene.getPlayerPokemon()!;
 
     game.move.select(Moves.TOXIC_SPIKES);
-    await game.phaseInterceptor.to("TurnEndPhase");
-    game.move.select(Moves.TOXIC_SPIKES);
-    await game.phaseInterceptor.to("TurnEndPhase");
-    game.move.select(Moves.ROAR);
-    await game.phaseInterceptor.to("TurnEndPhase");
-
-    const enemy = game.scene.getEnemyField()[0];
-    expect(enemy.hp).toBe(enemy.getMaxHp());
-    expect(enemy.status?.effect).toBeUndefined();
+    await game.toNextTurn();
+    // also make sure the toxic spikes are removed even if the pokemon
+    // that set them up is the one switching in (https://github.com/pagefaultgames/pokerogue/issues/935)
+    game.move.select(Moves.COURT_CHANGE);
+    await game.toNextTurn();
+    game.doSwitchPokemon(1);
+    await game.toNextTurn();
+    game.doSwitchPokemon(1);
+    await game.toNextTurn();
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
 
+    expect(muk.isFullHp()).toBe(true);
+    expect(muk.status?.effect).toBeUndefined();
     expect(game.scene.arena.tags.length).toBe(0);
-  }, TIMEOUT);
+  });
 
-  it("shouldn't create multiple layers per use in doubles", async() => {
+  it("shouldn't create multiple layers per use in doubles", async () => {
     await game.classicMode.runToSummon([ Species.MIGHTYENA, Species.POOCHYENA ]);
 
     game.move.select(Moves.TOXIC_SPIKES);
@@ -109,9 +112,9 @@ describe("Moves - Toxic Spikes", () => {
     const arenaTags = (game.scene.arena.getTagOnSide(ArenaTagType.TOXIC_SPIKES, ArenaTagSide.ENEMY) as ArenaTrapTag);
     expect(arenaTags.tagType).toBe(ArenaTagType.TOXIC_SPIKES);
     expect(arenaTags.layers).toBe(1);
-  }, TIMEOUT);
+  });
 
-  it("should persist through reload", async() => {
+  it("should persist through reload", async () => {
     game.override.startingWave(1);
     const scene = game.scene;
     const gameData = new GameData(scene);
@@ -132,5 +135,5 @@ describe("Moves - Toxic Spikes", () => {
 
     expect(sessionData.arena.tags).toEqual(recoveredData.arena.tags);
     localStorage.removeItem("sessionTestData");
-  }, TIMEOUT);
+  });
 });