diff --git a/data/battle_scripts_1.s b/data/battle_scripts_1.s
index 6ae21720cc..8a24a0043b 100644
--- a/data/battle_scripts_1.s
+++ b/data/battle_scripts_1.s
@@ -1652,6 +1652,7 @@ BattleScript_ToxicThreadTryPsn::
 
 BattleScript_EffectVenomDrench::
 	attackcanceler
+	jumpifsubstituteblocks BattleScript_ButItFailed
 	jumpifstatus BS_TARGET, STATUS1_PSN_ANY, BattleScript_EffectVenomDrenchCanBeUsed
 	goto BattleScript_ButItFailed
 BattleScript_EffectVenomDrenchCanBeUsed:
diff --git a/test/battle/move_effect/venom_drench.c b/test/battle/move_effect/venom_drench.c
index 00dac65858..aa09061f22 100644
--- a/test/battle/move_effect/venom_drench.c
+++ b/test/battle/move_effect/venom_drench.c
@@ -1,4 +1,42 @@
 #include "global.h"
 #include "test/battle.h"
 
-TO_DO_BATTLE_TEST("TODO: Write Venom Drench (Move Effect) test titles")
+ASSUMPTIONS
+{
+    ASSUME(GetMoveEffect(MOVE_VENOM_DRENCH) == EFFECT_VENOM_DRENCH);
+}
+
+SINGLE_BATTLE_TEST("Venom Drench lowers stats of a poisoned target")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET) { Moves(MOVE_VENOM_DRENCH); }
+        OPPONENT(SPECIES_WOBBUFFET) { Status1(STATUS1_POISON); }
+    } WHEN {
+        TURN { MOVE(player, MOVE_VENOM_DRENCH); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_VENOM_DRENCH, player);
+    } THEN {
+        EXPECT_EQ(opponent->statStages[STAT_ATK], DEFAULT_STAT_STAGE - 1);
+        EXPECT_EQ(opponent->statStages[STAT_SPATK], DEFAULT_STAT_STAGE - 1);
+        EXPECT_EQ(opponent->statStages[STAT_SPEED], DEFAULT_STAT_STAGE - 1);
+    }
+}
+
+SINGLE_BATTLE_TEST("Venom Drench is blocked by Substitute")
+{
+    GIVEN {
+        ASSUME(GetMoveEffect(MOVE_SUBSTITUTE) == EFFECT_SUBSTITUTE);
+        PLAYER(SPECIES_WOBBUFFET) { Moves(MOVE_VENOM_DRENCH, MOVE_CELEBRATE); }
+        OPPONENT(SPECIES_WOBBUFFET) { Moves(MOVE_SUBSTITUTE, MOVE_CELEBRATE); Status1(STATUS1_POISON); }
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_SUBSTITUTE); MOVE(player, MOVE_CELEBRATE); }
+        TURN { MOVE(opponent, MOVE_CELEBRATE); MOVE(player, MOVE_VENOM_DRENCH); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_SUBSTITUTE, opponent);
+        NOT ANIMATION(ANIM_TYPE_MOVE, MOVE_VENOM_DRENCH, player);
+    } THEN {
+        EXPECT_EQ(opponent->statStages[STAT_ATK], DEFAULT_STAT_STAGE);
+        EXPECT_EQ(opponent->statStages[STAT_SPATK], DEFAULT_STAT_STAGE);
+        EXPECT_EQ(opponent->statStages[STAT_SPEED], DEFAULT_STAT_STAGE);
+    }
+}