pcu: Introduce test TC_dl_multislot_tbf_ms_class_unknown

Related: OS#6118
Change-Id: I9af8792fe4c44b5dd1aab5a2d4b7d3c2a2366d12
diff --git a/pcu/expected-results.xml b/pcu/expected-results.xml
index eccff6f..2a25934 100644
--- a/pcu/expected-results.xml
+++ b/pcu/expected-results.xml
@@ -93,6 +93,12 @@
       PCU_Tests.ttcn:MASKED TC_dl_multislot_tbf_ms_class_from_sgsn testcase
     </failure>
   </testcase>
+  <testcase classname='PCU_Tests' name='TC_dl_multislot_tbf_ms_class_unknown' time='MASKED'>
+    <failure type='fail-verdict'>Expected 1 PDCH slots allocated but got 4
+      PCU_Tests.ttcn:MASKED PCU_Tests control part
+      PCU_Tests.ttcn:MASKED TC_dl_multislot_tbf_ms_class_unknown testcase
+    </failure>
+  </testcase>
   <testcase classname='PCU_Tests' name='TC_dl_multislot_tbf_ms_class_from_2phase' time='MASKED'/>
   <testcase classname='PCU_Tests' name='TC_ul_multislot_tbf_ms_class_from_2phase' time='MASKED'/>
   <testcase classname='PCU_Tests' name='TC_ul_tbf_reestablish_with_pkt_resource_req' time='MASKED'/>