diff --git a/support/testing/infra/basetest.py b/support/testing/infra/basetest.py
index 96c6848dfc..45bcd4c2e2 100644
--- a/support/testing/infra/basetest.py
+++ b/support/testing/infra/basetest.py
@@ -88,7 +88,12 @@ class BRTest(BRConfigTest):
         super(BRTest, self).tearDown()
 
     # Run the given 'cmd' with a 'timeout' on the target and
-    # assert that the command succeeded
+    # assert that the command succeeded; on error, print the
+    # faulty command and its output
     def assertRunOk(self, cmd, timeout=-1):
-        _, exit_code = self.emulator.run(cmd, timeout)
-        self.assertEqual(exit_code, 0)
+        out, exit_code = self.emulator.run(cmd, timeout)
+        self.assertEqual(
+            exit_code,
+            0,
+            "\nFailed to run: {}\noutput was:\n{}".format(cmd, '  '+'\n  '.join(out))
+        )