diff --git a/IPython/testing/iptestcontroller.py b/IPython/testing/iptestcontroller.py
index 178a02aa4..e41d86c39 100644
--- a/IPython/testing/iptestcontroller.py
+++ b/IPython/testing/iptestcontroller.py
@@ -675,6 +675,8 @@ def run_iptestall(options):
                 cov.xml_report(outfile='ipy_coverage.xml')
             except CoverageException as e:
                 print('Generating coverage report failed. Are you running javascript tests only?')
+                import traceback
+                traceback.print_exc()
 
     if failed:
         # Ensure that our exit code indicates failure