diff --git a/include/config/item.h b/include/config/item.h
index 195a78e457..119d79a14f 100644
--- a/include/config/item.h
+++ b/include/config/item.h
@@ -10,7 +10,7 @@
 #define I_VITAMIN_EV_CAP                GEN_LATEST  // In Gen8+, the Vitamins no longer have a cap of 100 EV per stat.
 #define I_BERRY_EV_JUMP                 GEN_LATEST  // In Gen4 only, EV-lowering Berries lower a stat's EV to 100 if it is above 100.
 #define I_GRISEOUS_ORB_FORM_CHANGE      GEN_LATEST  // In Gen9+, the Griseous Orb no longer changes Giratina's form when held.
-#define I_GEM_BOOST_POWER               GEN_LATEST  // In Gen5+, the Gem boost power was reduced from 50% to 30%.
+#define I_GEM_BOOST_POWER               GEN_LATEST  // In Gen6+, the Gem boost power was reduced from 50% to 30%.
 #define I_USE_EVO_HELD_ITEMS_FROM_BAG   FALSE       // If TRUE, items such as Razor Claw or Electirizer will be usable from the bag to evolve a Pokémon just like in LA.
 #define I_TYPE_BOOST_POWER              GEN_LATEST  // In Gen4+, all regular type boosting held items had their power increased from 10% to 20%. eg. Charcoal
 #define I_SELL_VALUE_FRACTION           GEN_LATEST  // In Gen9+, items sell for 1/4 of their value instead of 1/2.
diff --git a/test/battle/hold_effect/gems.c b/test/battle/hold_effect/gems.c
index c98718313d..c4ef15a0f1 100644
--- a/test/battle/hold_effect/gems.c
+++ b/test/battle/hold_effect/gems.c
@@ -32,7 +32,7 @@ SINGLE_BATTLE_TEST("Gem boost is only applied once")
     s16 normalHit;
 
     GIVEN {
-        ASSUME(I_GEM_BOOST_POWER >= GEN_5);
+        ASSUME(I_GEM_BOOST_POWER >= GEN_6);
         PLAYER(SPECIES_WOBBUFFET) { Item(ITEM_NORMAL_GEM); };
         OPPONENT(SPECIES_WOBBUFFET);
     } WHEN {