diff --git a/test/battle/ai.c b/test/battle/ai.c
index 28e541befd..819eb2edaa 100644
--- a/test/battle/ai.c
+++ b/test/battle/ai.c
@@ -955,3 +955,26 @@ AI_DOUBLE_BATTLE_TEST("AI will the see a corresponding absorbing ability on part
             TURN { EXPECT_MOVE(opponentLeft, MOVE_TACKLE); }
     }
 }
+
+AI_SINGLE_BATTLE_TEST("AI calculates guaranteed criticals and detects critical immunity")
+{
+    u32 ability;
+    PARAMETRIZE { ability = ABILITY_SWIFT_SWIM; }
+    PARAMETRIZE { ability = ABILITY_SHELL_ARMOR; }
+
+    GIVEN {
+        ASSUME(gMovesInfo[MOVE_STORM_THROW].alwaysCriticalHit);
+        ASSUME(gMovesInfo[MOVE_STORM_THROW].power == 60);
+        ASSUME(gMovesInfo[MOVE_BRICK_BREAK].power == 75);
+        ASSUME(gMovesInfo[MOVE_STORM_THROW].type == gMovesInfo[MOVE_BRICK_BREAK].type);
+        ASSUME(gMovesInfo[MOVE_STORM_THROW].category == gMovesInfo[MOVE_BRICK_BREAK].category);
+        AI_FLAGS(AI_FLAG_CHECK_BAD_MOVE | AI_FLAG_CHECK_VIABILITY | AI_FLAG_TRY_TO_FAINT | AI_FLAG_OMNISCIENT);
+        PLAYER(SPECIES_OMASTAR) { Ability(ability); }
+        OPPONENT(SPECIES_WOBBUFFET) { Moves(MOVE_STORM_THROW, MOVE_BRICK_BREAK); }
+    } WHEN {
+        if (ability == ABILITY_SHELL_ARMOR)
+            TURN { EXPECT_MOVE(opponent, MOVE_BRICK_BREAK); }
+        else
+            TURN { EXPECT_MOVE(opponent, MOVE_STORM_THROW); }
+    }
+}