diff --git a/src/python_testing/TC_SC_3_6.py b/src/python_testing/TC_SC_3_6.py
index a6994cbf288539..ec09d4bb8e815e 100644
--- a/src/python_testing/TC_SC_3_6.py
+++ b/src/python_testing/TC_SC_3_6.py
@@ -20,6 +20,7 @@
 import queue
 import time
 from threading import Event
+from typing import List
 
 import chip.clusters as Clusters
 from chip.clusters import ClusterObjects as ClustersObjects
@@ -123,6 +124,24 @@ async def test_TC_SC_3_6(self):
         )
         asserts.assert_greater_equal(capability_minima.caseSessionsPerFabric, 3)
 
+        logging.info("Pre-condition: Remove all pre-existing fabrics on the device that do not belong to the TH")
+        commissioned_fabric_count: int = await self.read_single_attribute(
+            dev_ctrl, node_id=self.dut_node_id,
+            endpoint=0, attribute=Clusters.OperationalCredentials.Attributes.CommissionedFabrics)
+
+        if commissioned_fabric_count > 1:
+            fabrics: List[Clusters.OperationalCredentials.Structs.FabricDescriptorStruct] = await self.read_single_attribute(
+                dev_ctrl, node_id=self.dut_node_id, endpoint=0,
+                attribute=Clusters.OperationalCredentials.Attributes.Fabrics, fabricFiltered=False)
+            current_fabric_index = await self.read_single_attribute_check_success(cluster=Clusters.OperationalCredentials, attribute=Clusters.OperationalCredentials.Attributes.CurrentFabricIndex)
+            for fabric in fabrics:
+                if fabric.fabricIndex == current_fabric_index:
+                    continue
+                # This is not the test client's fabric, so remove it.
+                logging.info(f"Removing extra fabric at {fabric.fabricIndex} from device.")
+                await dev_ctrl.SendCommand(
+                    self.dut_node_id, 0, Clusters.OperationalCredentials.Commands.RemoveFabric(fabricIndex=fabric.fabricIndex))
+
         logging.info("Pre-conditions: use existing fabric to configure new fabrics so that total is %d fabrics" %
                      num_fabrics_to_commission)