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-rw-r--r--tests/test_build_latex.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/tests/test_build_latex.py b/tests/test_build_latex.py
index 96ba87243..a59e8525c 100644
--- a/tests/test_build_latex.py
+++ b/tests/test_build_latex.py
@@ -61,8 +61,8 @@ def compile_latex_document(app, filename='python.tex'):
except CalledProcessError as exc:
print(exc.stdout.decode('utf8'))
print(exc.stderr.decode('utf8'))
- raise AssertionError('%s exited with return code %s' % (app.config.latex_engine,
- exc.returncode))
+ raise AssertionError(f'{app.config.latex_engine} exited with '
+ f'return code {exc.returncode}')
def skip_if_requested(testfunc):