diff --git a/pom.xml b/pom.xml
index a7b6c91df6b..48e7d9db95f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -383,7 +383,7 @@
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
-            <version>5.8.0</version>
+            <version>5.9.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BlockListener.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BlockListener.java
index b4dc7c38aee..12937e45a4d 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BlockListener.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BlockListener.java
@@ -226,9 +226,10 @@ private void callBlockHandler(BlockBreakEvent e, ItemStack item, List<ItemStack>
             // The main fix is in SlimefunItemInteractListener preventing opening to begin with
             // Close the inventory for all viewers of this block
             BlockMenu inventory = BlockStorage.getInventory(e.getBlock());
-            // TODO(future): Remove this check when MockBukkit supports viewers
-            if (inventory != null && !Slimefun.instance().isUnitTest()) {
-                inventory.toInventory().getViewers().forEach(HumanEntity::closeInventory);
+            if (inventory != null) {
+                for (HumanEntity human : new ArrayList<>(inventory.toInventory().getViewers())) {
+                    human.closeInventory();
+                }
             }
             // Remove the block data
             BlockStorage.clearBlockInfo(e.getBlock());
diff --git a/src/test/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/TestSlimefunItemInteractListener.java b/src/test/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/TestSlimefunItemInteractListener.java
index 08b506e8c69..cc33e3750ab 100644
--- a/src/test/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/TestSlimefunItemInteractListener.java
+++ b/src/test/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/TestSlimefunItemInteractListener.java
@@ -116,7 +116,9 @@ void testCannotOpenInvOfBrokenBlock() {
         // TODO: Create an event for open inventory so this isn't guess work
         Assertions.assertTrue(BlockMenuPreset.isInventory(electricFurnace.getId()));
         Assertions.assertTrue(BlockStorage.getStorage(block.getWorld()).hasInventory(block.getLocation()));
-        // TODO(future): Check viewers - MockBukkit does not implement this today
+
+        // Assert player has the inventory open
+        Assertions.assertEquals(1, BlockStorage.getInventory(block).toInventory().getViewers().size());
 
         // Break the block
         BlockBreakEvent blockBreakEvent = new BlockBreakEvent(block, player);
@@ -129,6 +131,9 @@ void testCannotOpenInvOfBrokenBlock() {
         // Assert the block is queued for removal
         Assertions.assertTrue(Slimefun.getTickerTask().isDeletedSoon(block.getLocation()));
 
+        // Assert that the inventory was closed
+        Assertions.assertEquals(0, BlockStorage.getInventory(block).toInventory().getViewers().size());
+
         // Clear event queue since we'll be running duplicate events
         server.getPluginManager().clearEvents();