diff --git a/Makefile.am b/Makefile.am
index cb789ce..a0d68c3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -576,6 +576,7 @@ noinst_DATA += \
 		src/testsuite/scheduling-wizards/environments/Ducks_rr_2.xgp \
 		src/testsuite/scheduling-wizards/environments/FruitsBasket_complex.xgp \
 		src/testsuite/scheduling-wizards/environments/Fantozzi_lifo_requests.xgp \
+		src/testsuite/scheduling-wizards/environments/Colori_rr_prio_1_2.xgp \
 		src/testsuite/scheduling-wizards/environments/ScuolaDiMileto_block_fail.xgp \
 		src/testsuite/scheduling-wizards/environments/ScuolaDiMileto_gap_blocked.xgp \
 		src/testsuite/scheduling-wizards/environments/ScuolaDiMileto_assert_fail.xgp \
diff --git a/src/testsuite/scheduling-wizards/environments/Colori_rr_prio_1_2.xgp b/src/testsuite/scheduling-wizards/environments/Colori_rr_prio_1_2.xgp
new file mode 100644
index 0000000..dcb7d53
--- /dev/null
+++ b/src/testsuite/scheduling-wizards/environments/Colori_rr_prio_1_2.xgp
@@ -0,0 +1,34 @@
+<?xml version="1.0"?>
+<!DOCTYPE sgpem SYSTEM "sgpem.dtd">
+<sgpem>
+  <resources>
+    <resource name="Ruota" id="reskey0" arrival-time="0" how-many="1" pre-emptible="false"/>
+  </resources>
+  <schedulables>
+    <process name="Giallo" priority="0" arrival-time="0">
+      <threads>
+        <thread name="Rosso" priority="4" arrival-delta="0" lasts-for="6">
+          <requests>
+            <request arrival-time="0">
+              <subrequest resource="0" lasts-for="3"/>
+            </request>
+          </requests>
+        </thread>
+        <thread name="Blu" priority="4" arrival-delta="2" lasts-for="1">
+          <requests>
+            <request arrival-time="0">
+              <subrequest resource="0" lasts-for="3"/>
+            </request>
+          </requests>
+        </thread>
+        <thread name="Viola" priority="0" arrival-delta="3" lasts-for="4">
+          <requests>
+            <request arrival-time="0">
+              <subrequest resource="0" lasts-for="1"/>
+            </request>
+          </requests>
+        </thread>
+      </threads>
+    </process>
+  </schedulables>
+</sgpem>