diff --git a/.github/workflows/dependencies-tests.yml b/.github/workflows/dependencies-tests.yml
index 2575f644..e06e2c05 100644
--- a/.github/workflows/dependencies-tests.yml
+++ b/.github/workflows/dependencies-tests.yml
@@ -3,6 +3,7 @@ name: Dependencies tests
 on:
   schedule:
     - cron: '0 0 * * 6'
+  pull_request:
 
 jobs:
   test-dependencies-combinations:
diff --git a/noxfile.py b/noxfile.py
index cdc8d9fa..b8f38a2d 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -24,6 +24,14 @@ def tests(session, xarray_version, dask_version, boto3_version, numpy_version):
         )
         session.skip()
 
+    # Numpy 1.26.0 is not supported with python 3.13
+    if numpy_version == "1.26" and session.python == "3.13":
+        session.log(
+            f"Skipping unsupported combination: "
+            f"numpy={numpy_version} and python={session.python}"
+        )
+        session.skip()
+
     session.install(
         format_to_correct_pip_command("xarray", xarray_version),
         format_to_correct_pip_command("dask", dask_version),
diff --git a/tests_dependencies_versions/test_basic_commands.py b/tests_dependencies_versions/test_basic_commands.py
index 95a41cab..abaf5672 100644
--- a/tests_dependencies_versions/test_basic_commands.py
+++ b/tests_dependencies_versions/test_basic_commands.py
@@ -15,6 +15,7 @@ def test_describe(self):
             "describe",
         ]
         self.output = execute_in_terminal(command)
+        assert self.output.returncode == 0
         json.loads(self.output.stdout)
 
     def test_subset(self, tmp_path):