diff --git a/test/python/WMCore_t/ReqMgr_t/Utils_t/Validation_t.py b/test/python/WMCore_t/ReqMgr_t/Utils_t/Validation_t.py
index 22723f27097..c4929b19251 100644
--- a/test/python/WMCore_t/ReqMgr_t/Utils_t/Validation_t.py
+++ b/test/python/WMCore_t/ReqMgr_t/Utils_t/Validation_t.py
@@ -7,8 +7,8 @@
 
 import unittest
 
-from WMCore.ReqMgr.Utils.Validation import validateOutputDatasets
 from WMCore.ReqMgr.DataStructs.RequestError import InvalidSpecParameterValue
+from WMCore.ReqMgr.Utils.Validation import validateOutputDatasets, validate_request_priority
 
 
 class ValidationTests(unittest.TestCase):
@@ -48,6 +48,43 @@ def testValidateOutputDatasets(self):
         with self.assertRaises(InvalidSpecParameterValue):
             validateOutputDatasets(outputDsets, dbsUrl)
 
+    def testRequestPriorityValidation(self):
+        """
+        Test the `validate_request_priority` function, which validates the
+        RequestPriority parameter
+        :return: nothing, raises an exception if there are problems
+        """
+        reqArgs = {'RequestPriority': "1234"}
+        # test an integer casted to string
+        validate_request_priority(reqArgs)
+        # test an integer
+        validate_request_priority(reqArgs)
+        # test a float (which is properly casted to int)
+        reqArgs = {'RequestPriority': 1234.25}
+        validate_request_priority(reqArgs)
+
+        # test an integer casted to a string, in an invalid range
+        reqArgs = {'RequestPriority': "1e7"}
+        with self.assertRaises(InvalidSpecParameterValue):
+            validate_request_priority(reqArgs)
+        # test an integer in an invalid range
+        reqArgs = {'RequestPriority': 1e7}
+        with self.assertRaises(InvalidSpecParameterValue):
+            validate_request_priority(reqArgs)
+        # test an integer in an invalid range
+        reqArgs = {'RequestPriority': -5}
+        with self.assertRaises(InvalidSpecParameterValue):
+            validate_request_priority(reqArgs)
+
+        # test a float casted to string
+        reqArgs = {'RequestPriority': "1234.25"}
+        with self.assertRaises(InvalidSpecParameterValue):
+            validate_request_priority(reqArgs)
+        # test a weird list
+        reqArgs = {'RequestPriority': [1234]}
+        with self.assertRaises(InvalidSpecParameterValue):
+            validate_request_priority(reqArgs)
+
 
 if __name__ == '__main__':
     unittest.main()