diff --git a/src/test/moves/fell_stinger.test.ts b/src/test/moves/fell_stinger.test.ts
new file mode 100644
index 00000000000..596a4aa8db0
--- /dev/null
+++ b/src/test/moves/fell_stinger.test.ts
@@ -0,0 +1,121 @@
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+import GameManager from "../utils/gameManager";
+import { Species } from "#enums/species";
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Stat } from "#enums/stat";
+import { StatusEffect } from "#app/enums/status-effect";
+import { WeatherType } from "#app/enums/weather-type";
+
+
+describe("Moves - Fell Stinger", () => {
+  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")
+      .moveset([ Moves.FELL_STINGER ])
+      .startingLevel(50);
+
+    game.override.enemyAbility(Abilities.STURDY)
+      .enemySpecies(Species.HYPNO)
+      .enemyLevel(5)
+      .enemyHeldItems([]);
+
+    game.override.weather(WeatherType.NONE);
+  });
+
+  it("should not grant stat boost when opponent gets KO'd by recoil", async () => {
+    game.override.enemyMoveset([ Moves.DOUBLE_EDGE ]);
+    await game.classicMode.startBattle([ Species.LEAVANNY ]);
+
+    const leadPokemon = game.scene.getPlayerPokemon()!;
+    game.move.select(Moves.FELL_STINGER);
+
+    await game.phaseInterceptor.to("VictoryPhase");
+
+    expect(leadPokemon.getStatStage(Stat.ATK) === 0); // Attack stage should still be at 0
+  });
+
+  it("should not grant stat boost when enemy is KO'd by status effect", async () => {
+    game.override
+      .enemyMoveset(Moves.SPLASH)
+      .enemyStatusEffect(StatusEffect.BURN);
+    await game.classicMode.startBattle([ Species.LEAVANNY ]);
+
+    const leadPokemon = game.scene.getPlayerPokemon()!;
+    game.move.select(Moves.FELL_STINGER);
+
+    await game.phaseInterceptor.to("VictoryPhase");
+
+    expect(leadPokemon.getStatStage(Stat.ATK) === 0); // Attack stage should still be at 0
+  });
+
+  it("should not grant stat boost when enemy is KO'd by damaging weather", async () => {
+    game.override.weather(WeatherType.HAIL);
+    await game.classicMode.startBattle([ Species.LEAVANNY ]);
+
+    const leadPokemon = game.scene.getPlayerPokemon()!;
+
+    game.move.select(Moves.FELL_STINGER);
+
+    await game.phaseInterceptor.to("VictoryPhase");
+
+    expect(leadPokemon.getStatStage(Stat.ATK) === 0); // Attack stage should still be at 0
+  });
+
+  it("should not grant stat boost when enemy is KO'd by Dry Skin + Harsh Sunlight", async () => {
+    game.override
+      .enemyPassiveAbility(Abilities.STURDY)
+      .enemyAbility(Abilities.DRY_SKIN)
+      .weather(WeatherType.HARSH_SUN);
+    await game.challengeMode.startBattle([ Species.LEAVANNY ]);
+
+    const leadPokemon = game.scene.getPlayerPokemon()!;
+
+    game.move.select(Moves.FELL_STINGER);
+
+    await game.phaseInterceptor.to("VictoryPhase");
+
+    expect(leadPokemon.getStatStage(Stat.ATK) === 0); // Attack stage should still be at 0
+  });
+
+  it("should not grant stat boost if enemy is saved by Reviver Seed", async () => {
+    game.override
+      .enemyAbility(Abilities.KLUTZ)
+      .enemyHeldItems([{ name: "REVIVER_SEED" }]);
+
+    await game.classicMode.startBattle([ Species.LEAVANNY ]);
+
+    const leadPokemon = game.scene.getPlayerPokemon()!;
+    game.move.select(Moves.FELL_STINGER);
+
+    await game.phaseInterceptor.to("TurnEndPhase");
+    expect(leadPokemon.getStatStage(Stat.ATK) === 0); // Attack stage should still be at 0
+  });
+
+  it("should grant stat boost when enemy dies directly to hit", async () => {
+    game.override.enemyAbility(Abilities.KLUTZ);
+    await game.challengeMode.startBattle([ Species.LEAVANNY ]);
+
+    const leadPokemon = game.scene.getPlayerPokemon()!;
+    game.move.select(Moves.FELL_STINGER);
+
+    await game.phaseInterceptor.to("VictoryPhase");
+
+    expect(leadPokemon.getStatStage(Stat.ATK) === 3); // Attack stage should have risen to 3
+  });
+});