diff --git a/executorlib/interactive/executor.py b/executorlib/interactive/executor.py
index 6e55ae5a..9dee5abd 100644
--- a/executorlib/interactive/executor.py
+++ b/executorlib/interactive/executor.py
@@ -220,6 +220,7 @@ def create_executor(
                 max_workers=validate_number_of_cores(
                     max_cores=max_cores,
                     max_workers=max_workers,
+                    cores_per_worker=cores_per_worker,
                     set_local_cores=False,
                 ),
                 executor_kwargs=resource_dict,
@@ -241,6 +242,7 @@ def create_executor(
                 max_workers=validate_number_of_cores(
                     max_cores=max_cores,
                     max_workers=max_workers,
+                    cores_per_worker=cores_per_worker,
                     set_local_cores=False,
                 ),
                 executor_kwargs=resource_dict,
@@ -270,6 +272,7 @@ def create_executor(
                 max_workers=validate_number_of_cores(
                     max_cores=max_cores,
                     max_workers=max_workers,
+                    cores_per_worker=cores_per_worker,
                     set_local_cores=True,
                 ),
                 executor_kwargs=resource_dict,
diff --git a/executorlib/standalone/inputcheck.py b/executorlib/standalone/inputcheck.py
index d776cf6b..040bbe51 100644
--- a/executorlib/standalone/inputcheck.py
+++ b/executorlib/standalone/inputcheck.py
@@ -172,6 +172,7 @@ def check_pysqa_config_directory(pysqa_config_directory: Optional[str]) -> None:
 def validate_number_of_cores(
     max_cores: Optional[int] = None,
     max_workers: Optional[int] = None,
+    cores_per_worker: Optional[int] = None,
     set_local_cores: bool = False,
 ) -> int:
     """
diff --git a/tests/test_shared_input_check.py b/tests/test_shared_input_check.py
index 44f5e599..21cc089d 100644
--- a/tests/test_shared_input_check.py
+++ b/tests/test_shared_input_check.py
@@ -98,12 +98,13 @@ def test_check_pysqa_config_directory(self):
             check_pysqa_config_directory(pysqa_config_directory="path/to/config")
 
     def test_validate_number_of_cores(self):
+        with self.assertRaises(ValueError):
+            validate_number_of_cores(max_cores=None, max_workers=None, cores_per_worker=None)
+        with self.assertRaises(TypeError):
+            validate_number_of_cores(max_cores=1, max_workers=None, cores_per_worker=None)
         self.assertIsInstance(
-            validate_number_of_cores(max_cores=None, max_workers=None), int
-        )
-        self.assertIsInstance(
-            validate_number_of_cores(max_cores=1, max_workers=None), int
+            validate_number_of_cores(max_cores=1, max_workers=None, cores_per_worker=1), int
         )
         self.assertIsInstance(
-            validate_number_of_cores(max_cores=None, max_workers=1), int
+            validate_number_of_cores(max_cores=None, max_workers=1, cores_per_worker=None), int
         )