Hi Trujillo, I'm running the same environment as you (Fedora 20, libvirt-1.1.3.3-2.fc20.x86_64) and I hit that (and other) error. I executed "cd tests/ && sudo ./run_tests.sh" on commit 9f33184 and this is the end of the error report: ====================================================================== ERROR: test_delete_running_vm (test_model.ModelTests) ---------------------------------------------------------------------- Traceback (most recent call last): File "/home/vianac/LTC/kimchi/tests/test_model.py", line 630, in test_delete_running_vm inst.vm_start(u'kīмkhī-∨м') File "/home/vianac/LTC/kimchi/src/kimchi/model/vms.py", line 358, in start dom.create() File "/home/vianac/LTC/kimchi/src/kimchi/model/libvirtconnection.py", line 65, in wrapper ret = f(*args, **kwargs) File "/home/vianac/LTC/kimchi/src/kimchi/model/libvirtconnection.py", line 65, in wrapper ret = f(*args, **kwargs) File "/home/vianac/LTC/kimchi/src/kimchi/model/libvirtconnection.py", line 65, in wrapper ret = f(*args, **kwargs) File "/home/vianac/LTC/kimchi/src/kimchi/model/libvirtconnection.py", line 65, in wrapper ret = f(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 708, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: Invalid argument ====================================================================== FAIL: test_debug_reports (test_model.ModelTests) ---------------------------------------------------------------------- Traceback (most recent call last): File "/home/vianac/LTC/kimchi/tests/test_model.py", line 709, in test_debug_reports "It is not necessary an error. " AssertionError: It is not necessary an error. You may need to increase the timeout number by TEST_REPORT_TIMEOUT=200 ./run_tests.sh test_model ---------------------------------------------------------------------- Ran 137 tests in 128.179s FAILED (failures=1, errors=1)