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-rw-r--r--tests/helpers.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/tests/helpers.py b/tests/helpers.py
index f4bff2b0..ebc15cd1 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -8,6 +8,7 @@ import subprocess
import sys
from coverage import env
+from coverage.backward import unicode_class
from coverage.misc import output_encoding
@@ -17,7 +18,7 @@ def run_command(cmd):
Returns the exit status code and the combined stdout and stderr.
"""
- if env.PY2 and isinstance(cmd, unicode):
+ if env.PY2 and isinstance(cmd, unicode_class):
cmd = cmd.encode(sys.getfilesystemencoding())
# In some strange cases (PyPy3 in a virtualenv!?) the stdout encoding of