diff --git a/Jenkinsfile b/Jenkinsfile
index ef963c5a..5cd2bc3b 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -97,11 +97,11 @@ pipeline {
           }
         }
         stage('Release') {
-          /*when {
+          when {
             expression {
               isReleaseBranchOfOrganisation('xmos')
             }
-          }*/
+          }
           steps {
             sh "mkdir ${REPO}/empty"
             xcoreReleaseToGithub("${WORKSPACE}/${REPO}","${WORKSPACE}/${REPO}/empty")
diff --git a/tests/test_i2s_loopback.py b/tests/test_i2s_loopback.py
index e304e580..9e50793b 100644
--- a/tests/test_i2s_loopback.py
+++ b/tests/test_i2s_loopback.py
@@ -34,17 +34,17 @@ def runtest():
     runtest_one_config('simulation', 'i2s', 'master', 2, 2, '48khz')
     runtest_one_config('simulation', 'i2s', 'slave', 2, 2, '48khz')
 
-    #runtest_one_config('simulation', 'i2s', 'master', 2, 2, '192khz')
-    #runtest_one_config('simulation', 'i2s', 'slave', 2, 2, '192khz')
+    runtest_one_config('simulation', 'i2s', 'master', 2, 2, '192khz')
+    runtest_one_config('simulation', 'i2s', 'slave', 2, 2, '192khz')
 
-    #runtest_one_config('simulation', 'i2s', 'master', 8, 8, '48khz')
-    #runtest_one_config('simulation', 'i2s', 'slave', 8, 8, '48khz')
+    runtest_one_config('simulation', 'i2s', 'master', 8, 8, '48khz')
+    runtest_one_config('simulation', 'i2s', 'slave', 8, 8, '48khz')
 
-    #runtest_one_config('simulation', 'i2s', 'master', 8, 8, '192khz')
-    #runtest_one_config('simulation', 'i2s', 'slave', 8, 8, '192khz')
+    runtest_one_config('simulation', 'i2s', 'master', 8, 8, '192khz')
+    runtest_one_config('simulation', 'i2s', 'slave', 8, 8, '192khz')
 
-    #runtest_one_config('simulation', 'tdm', 'master', 8, 8, '48khz')
-    #runtest_one_config('simulation', 'tdm', 'slave', 8, 8, '48khz')
+    runtest_one_config('simulation', 'tdm', 'master', 8, 8, '48khz')
+    runtest_one_config('simulation', 'tdm', 'slave', 8, 8, '48khz')
 
-    #runtest_one_config('simulation', 'tdm', 'master', 16, 16, '48khz')
-    #runtest_one_config('simulation', 'tdm', 'slave', 16, 16, '48khz')
+    runtest_one_config('simulation', 'tdm', 'master', 16, 16, '48khz')
+    runtest_one_config('simulation', 'tdm', 'slave', 16, 16, '48khz')