diff --git a/src/DIRAC/WorkloadManagementSystem/DB/TaskQueueDB.py b/src/DIRAC/WorkloadManagementSystem/DB/TaskQueueDB.py
index dd5ea79be74..eab2a53d76f 100755
--- a/src/DIRAC/WorkloadManagementSystem/DB/TaskQueueDB.py
+++ b/src/DIRAC/WorkloadManagementSystem/DB/TaskQueueDB.py
@@ -1159,57 +1159,13 @@ def __setPrioritiesForEntity(self, user, userGroup, share, connObj=False, consol
         tqDict = dict(result["Value"])
         if not tqDict:
             return S_OK()
-        # Calculate Sum of priorities
-        totalPrio = 0
-        for k in tqDict:
-            if tqDict[k] > 0.1 or not allowBgTQs:
-                totalPrio += tqDict[k]
-        # Update prio for each TQ
-        for tqId in tqDict:
-            if tqDict[tqId] > 0.1 or not allowBgTQs:
-                prio = (share / totalPrio) * tqDict[tqId]
-            else:
-                prio = TQ_MIN_SHARE
-            prio = max(prio, TQ_MIN_SHARE)
-            tqDict[tqId] = prio
 
-        # Generate groups of TQs that will have the same prio=sum(prios) maomenos
         result = self.retrieveTaskQueues(list(tqDict))
         if not result["OK"]:
             return result
         allTQsData = result["Value"]
-        tqGroups = {}
-        for tqid in allTQsData:
-            tqData = allTQsData[tqid]
-            for field in ("Jobs", "Priority") + priorityIgnoredFields:
-                if field in tqData:
-                    tqData.pop(field)
-            tqHash = []
-            for f in sorted(tqData):
-                tqHash.append(f"{f}:{tqData[f]}")
-            tqHash = "|".join(tqHash)
-            if tqHash not in tqGroups:
-                tqGroups[tqHash] = []
-            tqGroups[tqHash].append(tqid)
-        tqGroups = [tqGroups[td] for td in tqGroups]
-
-        # Do the grouping
-        for tqGroup in tqGroups:
-            totalPrio = 0
-            if len(tqGroup) < 2:
-                continue
-            for tqid in tqGroup:
-                totalPrio += tqDict[tqid]
-            for tqid in tqGroup:
-                tqDict[tqid] = totalPrio
-
-        # Group by priorities
-        prioDict = {}
-        for tqId in tqDict:
-            prio = tqDict[tqId]
-            if prio not in prioDict:
-                prioDict[prio] = []
-            prioDict[prio].append(tqId)
+
+        prioDict = calculate_priority(tqDict, allTQsData, share, allowBgTQs)
 
         # Execute updates
         for prio, tqs in prioDict.items():
@@ -1232,3 +1188,55 @@ def getGroupShares():
         for group in groups:
             shares[group] = gConfig.getValue(f"/Registry/Groups/{group}/JobShare", DEFAULT_GROUP_SHARE)
         return shares
+
+
+def calculate_priority(tqDict, allTQsData, share, allowBgTQs):
+    # Calculate Sum of priorities
+    totalPrio = 0
+    for k in tqDict:
+        if tqDict[k] > 0.1 or not allowBgTQs:
+            totalPrio += tqDict[k]
+    # Update prio for each TQ
+    for tqId in tqDict:
+        if tqDict[tqId] > 0.1 or not allowBgTQs:
+            prio = (share / totalPrio) * tqDict[tqId]
+        else:
+            prio = TQ_MIN_SHARE
+        prio = max(prio, TQ_MIN_SHARE)
+        tqDict[tqId] = prio
+
+    # Generate groups of TQs that will have the same prio=sum(prios) maomenos
+    tqGroups = {}
+    for tqid in allTQsData:
+        tqData = allTQsData[tqid]
+        for field in ("Jobs", "Priority") + priorityIgnoredFields:
+            if field in tqData:
+                tqData.pop(field)
+        tqHash = []
+        for f in sorted(tqData):
+            tqHash.append(f"{f}:{tqData[f]}")
+        tqHash = "|".join(tqHash)
+        if tqHash not in tqGroups:
+            tqGroups[tqHash] = []
+        tqGroups[tqHash].append(tqid)
+    tqGroups = [tqGroups[td] for td in tqGroups]
+
+    # Do the grouping
+    for tqGroup in tqGroups:
+        totalPrio = 0
+        if len(tqGroup) < 2:
+            continue
+        for tqid in tqGroup:
+            totalPrio += tqDict[tqid]
+        for tqid in tqGroup:
+            tqDict[tqid] = totalPrio
+
+    # Group by priorities
+    prioDict = {}
+    for tqId in tqDict:
+        prio = tqDict[tqId]
+        if prio not in prioDict:
+            prioDict[prio] = []
+        prioDict[prio].append(tqId)
+
+    return prioDict