diff --git a/fabric-content-registries-v0/src/testmod/java/net/fabricmc/fabric/test/content/registry/ContentRegistryGameTest.java b/fabric-content-registries-v0/src/testmod/java/net/fabricmc/fabric/test/content/registry/ContentRegistryGameTest.java
new file mode 100644
index 000000000..149b9e87d
--- /dev/null
+++ b/fabric-content-registries-v0/src/testmod/java/net/fabricmc/fabric/test/content/registry/ContentRegistryGameTest.java
@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.test.content.registry;
+
+import java.util.function.Consumer;
+
+import net.minecraft.block.Blocks;
+import net.minecraft.block.ComposterBlock;
+import net.minecraft.block.HopperBlock;
+import net.minecraft.block.entity.AbstractFurnaceBlockEntity;
+import net.minecraft.block.entity.BrewingStandBlockEntity;
+import net.minecraft.block.entity.HopperBlockEntity;
+import net.minecraft.component.DataComponentTypes;
+import net.minecraft.component.type.PotionContentsComponent;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.Items;
+import net.minecraft.potion.Potions;
+import net.minecraft.test.GameTest;
+import net.minecraft.test.TestContext;
+import net.minecraft.util.Hand;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.GameMode;
+
+import net.fabricmc.fabric.api.gametest.v1.FabricGameTest;
+
+public class ContentRegistryGameTest {
+	@GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE)
+	public void testCompostingChanceRegistry(TestContext context) {
+		BlockPos pos = new BlockPos(0, 1, 0);
+		context.setBlockState(pos, Blocks.COMPOSTER);
+		ItemStack obsidian = new ItemStack(Items.OBSIDIAN, 64);
+		PlayerEntity player = context.createMockPlayer(GameMode.SURVIVAL);
+		player.setStackInHand(Hand.MAIN_HAND, obsidian);
+		// If on level 0, composting always increases composter level
+		context.useBlock(pos, player);
+		context.expectBlockProperty(pos, ComposterBlock.LEVEL, 1);
+		context.assertEquals(obsidian.getCount(), 63, "obsidian stack count");
+		context.complete();
+	}
+
+	@GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE)
+	public void testFlattenableBlockRegistry(TestContext context) {
+		BlockPos pos = new BlockPos(0, 1, 0);
+		context.setBlockState(pos, Blocks.RED_WOOL);
+		ItemStack shovel = new ItemStack(Items.NETHERITE_SHOVEL);
+		PlayerEntity player = context.createMockPlayer(GameMode.SURVIVAL);
+		player.setStackInHand(Hand.MAIN_HAND, shovel);
+		context.useBlock(pos, player);
+		context.expectBlock(Blocks.YELLOW_WOOL, pos);
+		context.assertEquals(shovel.getDamage(), 1, "shovel damage");
+		context.complete();
+	}
+
+	@GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE, tickLimit = 110)
+	public void testFuelRegistry(TestContext context) {
+		BlockPos pos = new BlockPos(0, 1, 0);
+		// Use blast furnace to make it cook faster (100 ticks / 200 ticks)
+		context.setBlockState(pos, Blocks.BLAST_FURNACE);
+
+		if (!(context.getBlockEntity(pos) instanceof AbstractFurnaceBlockEntity furnace)) {
+			throw new AssertionError("Furnace was not placed");
+		}
+
+		furnace.setStack(0, new ItemStack(Items.RAW_IRON, 1));
+		// Ensure hopper inserts fuel to the furnace
+		context.setBlockState(pos.east(), Blocks.HOPPER.getDefaultState().with(HopperBlock.FACING, Direction.WEST));
+
+		if (!(context.getBlockEntity(pos.east()) instanceof HopperBlockEntity hopper)) {
+			throw new AssertionError("Hopper was not placed");
+		}
+
+		// 100 ticks/1 smelted item worth of fuel.
+		hopper.setStack(0, new ItemStack(Items.OBSIDIAN, 2));
+		hopper.setStack(1, new ItemStack(Items.DIRT));
+
+		context.waitAndRun(105, () -> {
+			context.assertTrue(hopper.isEmpty(), "fuel hopper should have been emptied");
+			context.assertTrue(ItemStack.areEqual(furnace.getStack(2), new ItemStack(Items.IRON_INGOT, 1)), "one iron ingot should have been smelted");
+			context.complete();
+		});
+	}
+
+	@GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE)
+	public void testStrippableBlockRegistry(TestContext context) {
+		BlockPos pos = new BlockPos(0, 1, 0);
+		context.setBlockState(pos, Blocks.QUARTZ_PILLAR);
+		ItemStack axe = new ItemStack(Items.NETHERITE_AXE);
+		PlayerEntity player = context.createMockPlayer(GameMode.SURVIVAL);
+		player.setStackInHand(Hand.MAIN_HAND, axe);
+		context.useBlock(pos, player);
+		context.expectBlock(Blocks.HAY_BLOCK, pos);
+		context.assertEquals(axe.getDamage(), 1, "axe damage");
+		context.complete();
+	}
+
+	@GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE)
+	public void testTillableBlockRegistry(TestContext context) {
+		BlockPos pos = new BlockPos(0, 1, 0);
+		context.setBlockState(pos, Blocks.GREEN_WOOL);
+		ItemStack hoe = new ItemStack(Items.NETHERITE_HOE);
+		PlayerEntity player = context.createMockPlayer(GameMode.SURVIVAL);
+		player.setStackInHand(Hand.MAIN_HAND, hoe);
+		context.useBlock(pos, player);
+		context.expectBlock(Blocks.LIME_WOOL, pos);
+		context.assertEquals(hoe.getDamage(), 1, "hoe damage");
+		context.complete();
+	}
+
+	@GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE)
+	public void testOxidizableBlocksRegistry(TestContext context) {
+		// Test de-oxidation. (the registry does not make the blocks oxidize.)
+		PlayerEntity player = context.createMockPlayer(GameMode.SURVIVAL);
+		BlockPos pos = new BlockPos(0, 1, 0);
+		context.setBlockState(pos, Blocks.DIAMOND_ORE);
+		ItemStack axe = new ItemStack(Items.NETHERITE_AXE);
+		player.setStackInHand(Hand.MAIN_HAND, axe);
+		context.useBlock(pos, player);
+		context.expectBlock(Blocks.GOLD_ORE, pos);
+		context.assertEquals(axe.getDamage(), 1, "axe damage");
+		context.useBlock(pos, player);
+		context.expectBlock(Blocks.IRON_ORE, pos);
+		context.useBlock(pos, player);
+		context.expectBlock(Blocks.COPPER_ORE, pos);
+		context.complete();
+	}
+
+	@GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE)
+	public void testWaxableBlocksRegistry(TestContext context) {
+		PlayerEntity player = context.createMockPlayer(GameMode.SURVIVAL);
+		BlockPos pos = new BlockPos(0, 1, 0);
+		context.setBlockState(pos, Blocks.DIAMOND_ORE);
+		ItemStack honeycomb = new ItemStack(Items.HONEYCOMB, 64);
+		player.setStackInHand(Hand.MAIN_HAND, honeycomb);
+		context.useBlock(pos, player);
+		context.expectBlock(Blocks.DEEPSLATE_DIAMOND_ORE, pos);
+		context.assertEquals(honeycomb.getCount(), 63, "honeycomb count");
+		ItemStack axe = new ItemStack(Items.NETHERITE_AXE);
+		player.setStackInHand(Hand.MAIN_HAND, axe);
+		context.useBlock(pos, player);
+		context.expectBlock(Blocks.DIAMOND_ORE, pos);
+		context.assertEquals(axe.getDamage(), 1, "axe damage");
+		context.complete();
+	}
+
+	private void brew(TestContext context, ItemStack input, ItemStack bottle, Consumer<BrewingStandBlockEntity> callback) {
+		BlockPos pos = new BlockPos(0, 1, 0);
+		context.setBlockState(pos, Blocks.BREWING_STAND);
+
+		if (!(context.getBlockEntity(pos) instanceof BrewingStandBlockEntity brewingStand)) {
+			throw new AssertionError("Brewing stand was not placed");
+		}
+
+		brewingStand.setStack(0, bottle);
+		brewingStand.setStack(3, input);
+		brewingStand.setStack(4, new ItemStack(Items.BLAZE_POWDER, 64));
+		context.waitAndRun(401, () -> callback.accept(brewingStand));
+	}
+
+	@GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE, tickLimit = 410)
+	public void testBrewingFlower(TestContext context) {
+		brew(context, new ItemStack(Items.DANDELION), PotionContentsComponent.createStack(Items.POTION, Potions.AWKWARD), brewingStand -> {
+			ItemStack bottle = brewingStand.getStack(0);
+			PotionContentsComponent potion = bottle.getOrDefault(DataComponentTypes.POTION_CONTENTS, PotionContentsComponent.DEFAULT);
+			context.assertEquals(potion.potion().orElseThrow(), Potions.HEALING, "brewed potion");
+			context.complete();
+		});
+	}
+
+	@GameTest(templateName = FabricGameTest.EMPTY_STRUCTURE, tickLimit = 410)
+	public void testBrewingDirt(TestContext context) {
+		brew(context, new ItemStack(Items.DIRT), PotionContentsComponent.createStack(Items.POTION, Potions.AWKWARD), brewingStand -> {
+			ItemStack bottle = brewingStand.getStack(0);
+			context.assertTrue(bottle.getItem() instanceof ContentRegistryTest.DirtyPotionItem, "potion became dirty");
+			context.complete();
+		});
+	}
+}
diff --git a/fabric-content-registries-v0/src/testmod/java/net/fabricmc/fabric/test/content/registry/ContentRegistryTest.java b/fabric-content-registries-v0/src/testmod/java/net/fabricmc/fabric/test/content/registry/ContentRegistryTest.java
index ecd347be5..f03db1954 100644
--- a/fabric-content-registries-v0/src/testmod/java/net/fabricmc/fabric/test/content/registry/ContentRegistryTest.java
+++ b/fabric-content-registries-v0/src/testmod/java/net/fabricmc/fabric/test/content/registry/ContentRegistryTest.java
@@ -94,8 +94,8 @@ public final class ContentRegistryTest implements ModInitializer {
 		FlammableBlockRegistry.getDefaultInstance().add(Blocks.DIAMOND_BLOCK, 4, 4);
 		FlammableBlockRegistry.getDefaultInstance().add(BlockTags.SAND, 4, 4);
 		FlattenableBlockRegistry.register(Blocks.RED_WOOL, Blocks.YELLOW_WOOL.getDefaultState());
-		FuelRegistry.INSTANCE.add(Items.OBSIDIAN, 60);
-		FuelRegistry.INSTANCE.add(ItemTags.DIRT, 120);
+		FuelRegistry.INSTANCE.add(Items.OBSIDIAN, 50);
+		FuelRegistry.INSTANCE.add(ItemTags.DIRT, 100);
 		LandPathNodeTypesRegistry.register(Blocks.DEAD_BUSH, PathNodeType.DAMAGE_OTHER, PathNodeType.DANGER_OTHER);
 		StrippableBlockRegistry.register(Blocks.QUARTZ_PILLAR, Blocks.HAY_BLOCK);
 
diff --git a/fabric-content-registries-v0/src/testmod/resources/fabric.mod.json b/fabric-content-registries-v0/src/testmod/resources/fabric.mod.json
index 02ffe1990..5217350e5 100644
--- a/fabric-content-registries-v0/src/testmod/resources/fabric.mod.json
+++ b/fabric-content-registries-v0/src/testmod/resources/fabric.mod.json
@@ -13,6 +13,7 @@
       "net.fabricmc.fabric.test.content.registry.ContentRegistryTest"
     ],
     "fabric-gametest": [
+      "net.fabricmc.fabric.test.content.registry.ContentRegistryGameTest",
       "net.fabricmc.fabric.test.content.registry.FlammableTest"
     ]
   },