diff --git a/src/test/java/xyz/alexcrea/cuanvil/api/UnitRepairApiTest.java b/src/test/java/xyz/alexcrea/cuanvil/api/UnitRepairApiTest.java
new file mode 100644
index 0000000..56028af
--- /dev/null
+++ b/src/test/java/xyz/alexcrea/cuanvil/api/UnitRepairApiTest.java
@@ -0,0 +1,119 @@
+package xyz.alexcrea.cuanvil.api;
+
+import org.bukkit.Material;
+import org.bukkit.event.inventory.InventoryType;
+import org.bukkit.inventory.AnvilInventory;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.Damageable;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.bukkit.inventory.meta.Repairable;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockbukkit.mockbukkit.entity.PlayerMock;
+import org.mockbukkit.mockbukkit.inventory.ItemStackMock;
+import xyz.alexcrea.cuanvil.config.ConfigHolder;
+import xyz.alexcrea.cuanvil.tests.ConfigResetCustomAnvilTest;
+import xyz.alexcrea.cuanvil.util.AnvilFuseTestData;
+import xyz.alexcrea.cuanvil.util.AnvilFuseTestUtil;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class UnitRepairApiTest extends ConfigResetCustomAnvilTest {
+
+    private AnvilInventory anvil;
+    private PlayerMock player;
+
+    @Override
+    @BeforeEach
+    public void setUp() {
+        super.setUp();
+        // Mock used player & open anvil
+        player = server.addPlayer();
+
+        Inventory anvil = server.createInventory(player, InventoryType.ANVIL);
+
+        this.anvil = (AnvilInventory) anvil;
+        player.openInventory(anvil);
+
+        ConfigHolder.DEFAULT_CONFIG.getConfig().set("debug_log", true);
+        ConfigHolder.DEFAULT_CONFIG.getConfig().set("debug_log_verbose", true);
+    }
+
+    @Test
+    void vanillaUnitRepair(){
+        ItemStack damagedPickaxe = new ItemStackMock(Material.DIAMOND_PICKAXE);
+        damagedPickaxe.setDurability((short) (Material.DIAMOND_PICKAXE.getMaxDurability() -1));
+
+        ItemStack resultPickaxe = new ItemStackMock(Material.DIAMOND_PICKAXE);
+        resultPickaxe.setDurability((short) (Material.DIAMOND_PICKAXE.getMaxDurability()/2));
+        ItemMeta meta = resultPickaxe.getItemMeta();
+        ((Repairable) meta).setRepairCost(1);
+
+        ItemStack diamond2 = new ItemStackMock(Material.DIAMOND, 2);
+
+        AnvilFuseTestData legalResultData = new AnvilFuseTestData(
+                damagedPickaxe, diamond2,
+                resultPickaxe,
+                // TODO add expected price
+                null
+        );
+
+        AnvilFuseTestUtil.executeAnvilTest(anvil, player, legalResultData);
+    }
+
+    @Test
+    void removeUnitRepair(){
+        ItemStack damagedPickaxe = new ItemStackMock(Material.DIAMOND_PICKAXE);
+        damagedPickaxe.setDurability((short) (Material.DIAMOND_PICKAXE.getMaxDurability() -1));
+
+        ItemStack diamond2 = new ItemStackMock(Material.DIAMOND, 2);
+
+        AnvilFuseTestData nullResultData = new AnvilFuseTestData(
+                damagedPickaxe, diamond2,
+                null
+        );
+
+        // Remove unit repair
+        assertTrue(UnitRepairApi.removeUnitRepair(Material.DIAMOND, Material.DIAMOND_PICKAXE));
+
+        AnvilFuseTestUtil.executeAnvilTest(anvil, player, nullResultData);
+
+        // see override
+        assertFalse(UnitRepairApi.addUnitRepair(Material.DIAMOND, Material.DIAMOND_PICKAXE, 0.25));
+        assertTrue(UnitRepairApi.addUnitRepair(Material.DIAMOND, Material.DIAMOND_PICKAXE, 0.25, true));
+    }
+
+
+    @Test
+    void addUnitRepair(){
+        ItemStack damagedPickaxe = new ItemStackMock(Material.DIAMOND_PICKAXE);
+        damagedPickaxe.setDurability((short) (Material.DIAMOND_PICKAXE.getMaxDurability() -1));
+
+        ItemStack resultPickaxe = new ItemStackMock(Material.DIAMOND_PICKAXE);
+        resultPickaxe.setDurability((short) (Material.DIAMOND_PICKAXE.getMaxDurability()/2));
+        ItemMeta meta = resultPickaxe.getItemMeta();
+        ((Repairable) meta).setRepairCost(1);
+
+        ItemStack stick2 = new ItemStackMock(Material.STICK, 2);
+
+        AnvilFuseTestData nullResultData = new AnvilFuseTestData(
+                damagedPickaxe, stick2,
+                null
+        );
+        AnvilFuseTestData legalResultData = new AnvilFuseTestData(
+                damagedPickaxe, stick2,
+                resultPickaxe,
+                // TODO add expected price
+                null
+        );
+
+        AnvilFuseTestUtil.executeAnvilTest(anvil, player, nullResultData);
+
+        // Add unit repair
+        assertTrue(UnitRepairApi.addUnitRepair(Material.STICK, Material.DIAMOND_PICKAXE));
+        assertFalse(UnitRepairApi.addUnitRepair(Material.STICK, Material.DIAMOND_PICKAXE));
+        AnvilFuseTestUtil.executeAnvilTest(anvil, player, legalResultData);
+    }
+
+}