diff --git a/tests/test_i2s_loopback.py b/tests/test_i2s_loopback.py
index 411f56b4..e304e580 100644
--- a/tests/test_i2s_loopback.py
+++ b/tests/test_i2s_loopback.py
@@ -31,8 +31,8 @@ def runtest_one_config(env, format, i2s_role, num_chans_in, num_chans_out, sampl
     xmostest.run_on_simulator(resources['xsim'], binary, tester=tester, simargs=['--max-cycles', str(max_cycles), '--plugin', 'LoopbackPort.dll', loopback_args])
 
 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, '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')