diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..429067c
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,21 @@
+name: Perform unit tests
+
+on:
+    push:
+        branches: [main]
+    pull_request:
+        branches: [main]
+
+jobs:
+    test:
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Checkout branch
+              uses: actions/checkout@v4
+            - name: Install Deno
+              uses: denoland/setup-deno@v1
+              with:
+                deno-version: v1.44.4
+            - name: Run tests
+              run: ./test.sh
diff --git a/dist/libvoxel.h b/dist/libvoxel.h
index 47a51c2..edd52cc 100644
--- a/dist/libvoxel.h
+++ b/dist/libvoxel.h
@@ -883,10 +883,9 @@ void voxel_builtins_core_fillBuffer(voxel_Executor* executor) {
         writeCount++;
     }
 
+    voxel_unreferenceThing(executor->context, byteThing);
     voxel_unreferenceThing(executor->context, bufferThing);
 
-    byteThing->referenceCount++;
-
     voxel_push(executor, voxel_newNumberInt(executor->context, start));
 }
 
diff --git a/src/builtins/core/buffers.h b/src/builtins/core/buffers.h
index 662231a..f8279f3 100644
--- a/src/builtins/core/buffers.h
+++ b/src/builtins/core/buffers.h
@@ -141,10 +141,9 @@ void voxel_builtins_core_fillBuffer(voxel_Executor* executor) {
         writeCount++;
     }
 
+    voxel_unreferenceThing(executor->context, byteThing);
     voxel_unreferenceThing(executor->context, bufferThing);
 
-    byteThing->referenceCount++;
-
     voxel_push(executor, voxel_newNumberInt(executor->context, start));
 }
 
diff --git a/test/buffers/main.vxl b/test/buffers/main.vxl
index 2ef3033..074840c 100644
--- a/test/buffers/main.vxl
+++ b/test/buffers/main.vxl
@@ -1,5 +1,6 @@
 import buffers;
 
+
 var byte1 = Byte(0x41);
 var byte2 = Byte("B");
 
@@ -31,8 +32,10 @@ syscall log("Set byte at index 1 in buffer: ");
 syscall log(buffer[1]);
 syscall log("\n");
 
+
 var bigBuffer = buffers.create(65536 * 4, Byte("."));
 
+
 syscall log("Section of big buffer: ");
 syscall log(bigBuffer.section((65536 * 2) + 4, (65536 * 2) + 12));
 syscall log("\n");
diff --git a/test/test.js b/test/test.js
index 20cfe10..b1c74d3 100644
--- a/test/test.js
+++ b/test/test.js
@@ -122,11 +122,11 @@ for await (var entry of Deno.readDir(TEST_DIR)) {
         var command = new Deno.Command(VOXEL_FILE, {args: [path.join(TEST_PATH, "main.loop.vxc")], stdout: "null"});
         var process = command.spawn();
 
-        await delay(1_000);
+        await delay(4_000);
 
         var before = await measureMemoryUsage(process.pid);
         
-        await delay(4_000);
+        await delay(8_000);
 
         var after = await measureMemoryUsage(process.pid);