diff --git a/.github/workflows/linux_cuda_wheel.yaml b/.github/workflows/linux_cuda_wheel.yaml
index bd57cac5..7329e460 100644
--- a/.github/workflows/linux_cuda_wheel.yaml
+++ b/.github/workflows/linux_cuda_wheel.yaml
@@ -137,7 +137,7 @@ jobs:
           ls
       - name: Run Python tests
         run: |
-          ${CONDA_RUN} FAIL_WITHOUT_CUDA=1 pytest test -v --tb=short
+          ${CONDA_RUN} FAIL_WITHOUT_CUDA=1 pytest test -v --tb=short -k test_num_channels
       - name: Run Python benchmark
         run: |
           ${CONDA_RUN} time python benchmarks/decoders/gpu_benchmark.py --devices=cuda:0,cpu --resize_devices=none
diff --git a/.github/workflows/linux_wheel.yaml b/.github/workflows/linux_wheel.yaml
index 1855e904..eaaa4235 100644
--- a/.github/workflows/linux_wheel.yaml
+++ b/.github/workflows/linux_wheel.yaml
@@ -123,4 +123,4 @@ jobs:
           ls
       - name: Run Python tests
         run: |
-          pytest test -vvv
+          pytest test -vvv -k test_num_channels
diff --git a/.github/workflows/macos_wheel.yaml b/.github/workflows/macos_wheel.yaml
index ee436b7a..2c39e9dc 100644
--- a/.github/workflows/macos_wheel.yaml
+++ b/.github/workflows/macos_wheel.yaml
@@ -122,4 +122,4 @@ jobs:
 
       - name: Run Python tests
         run: |
-          pytest test -vvv
+          pytest test -vvv -k test_num_channels
diff --git a/test/test_encoders.py b/test/test_encoders.py
index d432263a..d42d0369 100644
--- a/test/test_encoders.py
+++ b/test/test_encoders.py
@@ -367,8 +367,9 @@ def test_contiguity(self):
     @pytest.mark.parametrize("num_channels_input", (1, 2))
     @pytest.mark.parametrize("num_channels_output", (1, 2, None))
     @pytest.mark.parametrize("method", ("to_file", "to_tensor"))
+    @pytest.mark.parametrize("i", range(1000))
     def test_num_channels(
-        self, num_channels_input, num_channels_output, method, tmp_path
+        self, num_channels_input, num_channels_output, method, tmp_path, i
     ):
         # We just check that the num_channels parameter is respected.
         # Correctness is checked in other tests (like test_against_cli())