diff --git a/hpcflow/sdk/submission/schedulers/slurm.py b/hpcflow/sdk/submission/schedulers/slurm.py
index e6a4f4b0..2fa5f589 100644
--- a/hpcflow/sdk/submission/schedulers/slurm.py
+++ b/hpcflow/sdk/submission/schedulers/slurm.py
@@ -284,7 +284,8 @@ def __is_present_supported(
         Test if information is present on both sides, and also matches.
         """
         return bool(
-            num_req and part_have and cls.is_num_cores_supported(num_req, part_have)
+            num_req is None
+            or (part_have and cls.is_num_cores_supported(num_req, part_have))
         )
 
     @classmethod
diff --git a/hpcflow/tests/data/workflow_2_slurm.yaml b/hpcflow/tests/data/workflow_2_slurm.yaml
new file mode 100644
index 00000000..011dda1c
--- /dev/null
+++ b/hpcflow/tests/data/workflow_2_slurm.yaml
@@ -0,0 +1,24 @@
+template_components:
+  task_schemas:
+  - objective: locate_bash
+    outputs:
+      - parameter: bash_location
+    actions:
+    - commands:
+      - command: which bash
+        stdout: <<parameter:bash_location>>
+      environments:
+      - scope:
+          type: any
+        environment: null_env
+
+tasks:
+- schema: locate_bash
+
+resources:
+  any:
+    scheduler_args:
+      directives:
+        --time: 00:30:00
+#        --partition: serial
+    num_cores: 1
diff --git a/hpcflow/tests/schedulers/slurm/test_slurm_submission.py b/hpcflow/tests/schedulers/slurm/test_slurm_submission.py
index 117fea0e..d0cc329d 100644
--- a/hpcflow/tests/schedulers/slurm/test_slurm_submission.py
+++ b/hpcflow/tests/schedulers/slurm/test_slurm_submission.py
@@ -12,3 +12,29 @@ def test_workflow_1(tmp_path: Path, null_config):
     p2 = wk.tasks[0].elements[0].outputs.p2
     assert isinstance(p2, hf.ElementParameter)
     assert p2.value == "201"
+
+
+@pytest.mark.slurm
+def test_workflow_2(tmp_path: Path, null_config):
+    hf.config.add_scheduler("slurm")
+    wk = make_test_data_YAML_workflow("workflow_2_slurm.yaml", path=tmp_path)
+    wk.submit(wait=True, add_to_known=False)
+    bash_location = wk.tasks[0].elements[0].outputs.bash_location
+    assert isinstance(bash_location, hf.ElementParameter)
+    assert "bash" in bash_location.value
+
+
+def test_slurm_partition_select():
+    slurm = hf.SlurmPosix()
+    resources = hf.ElementResources()
+    config = {
+        "partitions": {
+            "serial": {
+                "num_nodes": [1, 1, 1],
+                "num_cores": [1, 1, 1],
+                "num_cores_per_node": [1, 1, 1],
+            }
+        }
+    }
+    slurm.process_resources(resources, config)
+    assert resources.SLURM_partition == "serial"