diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 56d3fe6dd7..07ae6b09ab 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -13,7 +13,7 @@ jobs:
       with:
         java-version: 14
     - name: Run unit tests
-      run: ./gradlew test
+      run: ./gradlew clean cleanTest test
     - name: Trigger BE build
       if: ${{ github.repository == 'Anuken/Mindustry' }}
       run: |
diff --git a/core/src/mindustry/world/blocks/distribution/Conveyor.java b/core/src/mindustry/world/blocks/distribution/Conveyor.java
index 23fa7a2a46..ab6f394afd 100644
--- a/core/src/mindustry/world/blocks/distribution/Conveyor.java
+++ b/core/src/mindustry/world/blocks/distribution/Conveyor.java
@@ -255,7 +255,7 @@ public class Conveyor extends Block implements Autotiler{
         }
 
         public boolean pass(Item item){
-            if(next != null && next.team == team && next.acceptItem(this, item)){
+            if(item != null && next != null && next.team == team && next.acceptItem(this, item)){
                 next.handleItem(this, item);
                 return true;
             }