diff --git a/django_project/gap/tests/utils/test_dask.py b/django_project/gap/tests/utils/test_dask.py
new file mode 100644
index 0000000..2f60363
--- /dev/null
+++ b/django_project/gap/tests/utils/test_dask.py
@@ -0,0 +1,37 @@
+# coding=utf-8
+"""
+Tomorrow Now GAP.
+
+.. note:: Unit tests for Zarr Utilities.
+"""
+
+from django.test import TestCase
+
+from gap.models import Preferences
+from gap.utils.dask import execute_dask_compute
+
+
+class MockDelayed(object):
+    """Mock class for delayed object."""
+
+    def compute(self):
+        """Mock compute method."""
+        pass
+
+
+class TestDaskUtils(TestCase):
+    """Unit test for dask utilities."""
+
+    def test_empty_num_of_threads(self):
+        """Test num_of_threads is not set."""
+        preferences = Preferences.load()
+        preferences.dask_threads_num = -1
+        preferences.save()
+        execute_dask_compute(MockDelayed())
+
+    def test_use_num_of_threads(self):
+        """Test num_of_threads is set to 1."""
+        preferences = Preferences.load()
+        preferences.dask_threads_num = 1
+        preferences.save()
+        execute_dask_compute(MockDelayed())