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-rw-r--r--tests/qemu-iotests/iotests.py8
1 files changed, 7 insertions, 1 deletions
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 109fb3884a..2a08fea3c9 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -217,7 +217,13 @@ class QemuIoInteractive:
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
universal_newlines=True)
- assert self._p.stdout.read(9) == 'qemu-io> '
+ out = self._p.stdout.read(9)
+ if out != 'qemu-io> ':
+ # Most probably qemu-io just failed to start.
+ # Let's collect the whole output and exit.
+ out += self._p.stdout.read()
+ self._p.wait(timeout=1)
+ raise ValueError(out)
def close(self):
self._p.communicate('q\n')