diff --git a/src/data/ability.ts b/src/data/ability.ts
index 7c2fbeac77b..c287fe336c5 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -3579,24 +3579,22 @@ export class MoodyAbAttr extends PostTurnAbAttr {
   }
 }
 
-export class PostTurnStatStageChangeAbAttr extends PostTurnAbAttr {
+export class SpeedBoostAbAttr extends PostTurnAbAttr {
   private stats: BattleStat[];
   private stages: number;
 
-  constructor(stats: BattleStat[], stages: number) {
+  constructor() {
     super(true);
 
-    this.stats = Array.isArray(stats)
-      ? stats
-      : [ stats ];
-    this.stages = stages;
+    this.stats = Array.isArray([ Stat.SPD ])
+      ? [ Stat.SPD ]
+      : [  Stat.SPD  ];
+    this.stages = 1;
   }
 
   applyPostTurn(pokemon: Pokemon, passive: boolean, simulated: boolean, args: any[]): boolean {
     if (!simulated) {
-      if (!pokemon.hasAbility(Abilities.SPEED_BOOST)) {
-        pokemon.scene.unshiftPhase(new StatStageChangePhase(pokemon.scene, pokemon.getBattlerIndex(), true, this.stats, this.stages));
-      } else if (pokemon.hasAbility(Abilities.SPEED_BOOST) && !pokemon.turnData.switchedInThisTurn && !pokemon.turnData.failedRunAway) {
+      if (!pokemon.turnData.switchedInThisTurn && !pokemon.turnData.failedRunAway) {
         pokemon.scene.unshiftPhase(new StatStageChangePhase(pokemon.scene, pokemon.getBattlerIndex(), true, this.stats, this.stages));
       } else {
         return false;
@@ -4865,7 +4863,7 @@ export function initAbilities() {
       .attr(PostSummonWeatherChangeAbAttr, WeatherType.RAIN)
       .attr(PostBiomeChangeWeatherChangeAbAttr, WeatherType.RAIN),
     new Ability(Abilities.SPEED_BOOST, 3)
-      .attr(PostTurnStatStageChangeAbAttr, [ Stat.SPD ], 1),
+      .attr(SpeedBoostAbAttr),
     new Ability(Abilities.BATTLE_ARMOR, 3)
       .attr(BlockCritAbAttr)
       .ignorable(),
diff --git a/src/phases/attempt-run-phase.ts b/src/phases/attempt-run-phase.ts
index 44cb014083d..b4768dc9a26 100644
--- a/src/phases/attempt-run-phase.ts
+++ b/src/phases/attempt-run-phase.ts
@@ -10,13 +10,14 @@ import { NewBattlePhase } from "./new-battle-phase";
 import { PokemonPhase } from "./pokemon-phase";
 
 export class AttemptRunPhase extends PokemonPhase {
-  constructor(scene: BattleScene, fieldIndex: number) {
-    super(scene, fieldIndex);
-  }
 
   /** For testing purposes: this is to force the pokemon to fail and escape */
   public forceFailEscape = false;
 
+  constructor(scene: BattleScene, fieldIndex: number) {
+    super(scene, fieldIndex);
+  }
+
   start() {
     super.start();