diff --git a/src/battle_util.c b/src/battle_util.c
index 77b02637d414..68cf7a1cef5b 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -5315,9 +5315,9 @@ u32 AbilityBattleEffects(u32 caseID, u32 battler, u32 ability, u32 special, u32
              && GetBattlerHoldEffect(gBattlerAttacker, TRUE) != HOLD_EFFECT_PROTECTIVE_PADS
              && IsMoveMakingContact(move, gBattlerAttacker)
              && gBattleStruct->overwrittenAbilities[gBattlerAttacker] != GetBattlerAbility(gBattlerTarget)
-             && gBattleMons[gBattlerTarget].ability != ABILITY_MUMMY
-             && gBattleMons[gBattlerTarget].ability != ABILITY_LINGERING_AROMA
-             && !gAbilitiesInfo[gBattleMons[gBattlerTarget].ability].cantBeSuppressed)
+             && gBattleMons[gBattlerAttacker].ability != ABILITY_MUMMY
+             && gBattleMons[gBattlerAttacker].ability != ABILITY_LINGERING_AROMA
+             && !gAbilitiesInfo[gBattleMons[gBattlerAttacker].ability].cantBeSuppressed)
             {
                 if (GetBattlerHoldEffect(gBattlerAttacker, TRUE) == HOLD_EFFECT_ABILITY_SHIELD)
                 {
diff --git a/test/battle/ability/lingering_aroma.c b/test/battle/ability/lingering_aroma.c
new file mode 100644
index 000000000000..a4ef5fc48fa2
--- /dev/null
+++ b/test/battle/ability/lingering_aroma.c
@@ -0,0 +1,4 @@
+#include "global.h"
+#include "test/battle.h"
+
+// Tests for Lingering Aroma are handled in test/battle/ability/mummy.c
diff --git a/test/battle/ability/mummy.c b/test/battle/ability/mummy.c
new file mode 100644
index 000000000000..ed80a178e6f4
--- /dev/null
+++ b/test/battle/ability/mummy.c
@@ -0,0 +1,98 @@
+#include "global.h"
+#include "test/battle.h"
+
+SINGLE_BATTLE_TEST("Mummy/Lingering Aroma replace the attacker's ability on contact")
+{
+    u32 move, ability, species;
+
+    PARAMETRIZE { move = MOVE_AQUA_JET; ability = ABILITY_MUMMY; species = SPECIES_YAMASK; }
+    PARAMETRIZE { move = MOVE_WATER_GUN; ability = ABILITY_MUMMY; species = SPECIES_YAMASK;}
+    PARAMETRIZE { move = MOVE_AQUA_JET; ability = ABILITY_LINGERING_AROMA; species = SPECIES_OINKOLOGNE; }
+    PARAMETRIZE { move = MOVE_WATER_GUN; ability = ABILITY_LINGERING_AROMA; species = SPECIES_OINKOLOGNE; }
+    GIVEN {
+        ASSUME(gMovesInfo[MOVE_AQUA_JET].makesContact);
+        ASSUME(!gMovesInfo[MOVE_WATER_GUN].makesContact);
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(species) { Ability(ability); }
+    } WHEN {
+        TURN { MOVE(player, move); }
+    } SCENE {
+        if (gMovesInfo[move].makesContact) {
+            ABILITY_POPUP(opponent, ability);
+            if (ability == ABILITY_MUMMY)
+                MESSAGE("Wobbuffet acquired Mummy!");
+            else
+                MESSAGE("Wobbuffet acquired Lingering Aroma!");
+        } else {
+            NONE_OF {
+                ABILITY_POPUP(opponent, ability);
+                if (ability == ABILITY_MUMMY)
+                    MESSAGE("Wobbuffet acquired Mummy!");
+                else
+                    MESSAGE("Wobbuffet acquired Lingering Aroma!");
+            }
+        }
+    }
+}
+
+SINGLE_BATTLE_TEST("Mummy and Lingering Aroma don't replace each other")
+{
+    u32 ability1, species1, ability2, species2;
+
+    PARAMETRIZE { ability1 = ability2 = ABILITY_MUMMY; species1 = species2 = SPECIES_YAMASK; }
+    PARAMETRIZE { ability1 = ABILITY_MUMMY; species1 = SPECIES_YAMASK; ability2 = ABILITY_LINGERING_AROMA; species2 = SPECIES_OINKOLOGNE; }
+    PARAMETRIZE { ability1 = ability2 = ABILITY_LINGERING_AROMA; species1 = species2 = SPECIES_OINKOLOGNE; }
+    GIVEN {
+        ASSUME(gMovesInfo[MOVE_AQUA_JET].makesContact);
+        PLAYER(species1) { Ability(ability1); Speed(2); }
+        OPPONENT(species2) { Ability(ability2); Speed(1); }
+    } WHEN {
+        TURN { MOVE(player, MOVE_AQUA_JET); MOVE(opponent, MOVE_AQUA_JET); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_AQUA_JET, player);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_AQUA_JET, opponent);
+        NONE_OF {
+            ABILITY_POPUP(player, ability1);
+            ABILITY_POPUP(player, ability2);
+            ABILITY_POPUP(opponent, ability1);
+            ABILITY_POPUP(opponent, ability2);
+            MESSAGE("Yamask acquired Mummy!");
+            MESSAGE("Yamask acquired Lingering Aroma!");
+            MESSAGE("Oinkologne acquired Mummy!");
+            MESSAGE("Oinkologne acquired Lingering Aroma!");
+        }
+    }
+}
+
+SINGLE_BATTLE_TEST("Mummy doesn't replace abilities that can't be suppressed")
+{
+    u32 species, ability;
+
+    PARAMETRIZE { species = SPECIES_ARCEUS; ability = ABILITY_MULTITYPE; }
+    PARAMETRIZE { species = SPECIES_AEGISLASH; ability = ABILITY_STANCE_CHANGE; }
+    PARAMETRIZE { species = SPECIES_WISHIWASHI; ability = ABILITY_SCHOOLING; }
+    PARAMETRIZE { species = SPECIES_KOMALA; ability = ABILITY_COMATOSE; }
+    PARAMETRIZE { species = SPECIES_MINIOR; ability = ABILITY_SHIELDS_DOWN; }
+    PARAMETRIZE { species = SPECIES_MIMIKYU; ability = ABILITY_DISGUISE; }
+    PARAMETRIZE { species = SPECIES_SILVALLY; ability = ABILITY_RKS_SYSTEM; }
+    PARAMETRIZE { species = SPECIES_GRENINJA_BATTLE_BOND; ability = ABILITY_BATTLE_BOND; }
+    PARAMETRIZE { species = SPECIES_ZYGARDE; ability = ABILITY_POWER_CONSTRUCT; }
+    PARAMETRIZE { species = SPECIES_EISCUE; ability = ABILITY_ICE_FACE; }
+    PARAMETRIZE { species = SPECIES_CRAMORANT; ability = ABILITY_GULP_MISSILE; }
+    PARAMETRIZE { species = SPECIES_PALAFIN_ZERO; ability = ABILITY_ZERO_TO_HERO; }
+    PARAMETRIZE { species = SPECIES_TATSUGIRI; ability = ABILITY_COMMANDER; }
+    PARAMETRIZE { species = SPECIES_CALYREX_SHADOW_RIDER; ability = ABILITY_AS_ONE_SHADOW_RIDER; }
+    PARAMETRIZE { species = SPECIES_CALYREX_ICE_RIDER; ability = ABILITY_AS_ONE_ICE_RIDER; }
+
+    GIVEN {
+        PLAYER(SPECIES_YAMASK);
+        OPPONENT(species) { Ability(ability); }
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_AQUA_JET); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_AQUA_JET, opponent);
+        NONE_OF {
+            ABILITY_POPUP(opponent, ABILITY_MUMMY);
+        }
+    }
+}