diff --git a/.github/workflows/test_assembler_none.yml b/.github/workflows/test_assembler_none.yml
new file mode 100755
index 0000000..edada46
--- /dev/null
+++ b/.github/workflows/test_assembler_none.yml
@@ -0,0 +1,40 @@
+name: Test Donut Falls no assemblers
+
+on: [pull_request, workflow_dispatch]
+
+jobs:
+
+  test:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+            
+      - name: Install Nextflow
+        run: |
+          wget -qO- get.nextflow.io | bash
+          sudo mv nextflow /usr/local/bin/
+          
+      - name: Download Unicycler test files
+        run: |
+          mkdir reads
+          # from unicycler test data
+          wget --quiet https://github.com/rrwick/Unicycler/raw/69e712eb95c4b9f8a46aade467260260a9ce7a91/sample_data/short_reads_1.fastq.gz
+          wget --quiet https://github.com/rrwick/Unicycler/raw/69e712eb95c4b9f8a46aade467260260a9ce7a91/sample_data/short_reads_2.fastq.gz
+          #wget --quiet https://github.com/rrwick/Unicycler/raw/69e712eb95c4b9f8a46aade467260260a9ce7a91/sample_data/long_reads_high_depth.fastq.gz
+          wget --quiet https://github.com/rrwick/Unicycler/raw/69e712eb95c4b9f8a46aade467260260a9ce7a91/sample_data/long_reads_low_depth.fastq.gz
+
+          mv *fastq.gz reads/.
+
+      - name: Run Donut Falls
+        run: |
+          docker --version
+          
+          nextflow run . -profile docker -c .github/workflows/github_actions.config --sample_sheet .github/workflows/github_actions_hybrid_sample_sheet.txt --assembler doesnt_exist
+
+          tree donut_falls
+
+      - name: Check files
+        run: |
+          ls  donut_falls/multiqc/multiqc_report.html
+          cat donut_falls/summary/donut_falls_summary.json
\ No newline at end of file