diff --git a/tests/test_cli.py b/tests/test_cli.py
index b487a64..0d7388b 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -52,8 +52,7 @@ def test_codec_and_infile_arguments():
         test_file,
     ]
     out, err, exitcode = helpers.cli_call(command)
-
-    assert out.decode().split("\n")[0].replace("\r", "") == "ISO-10303-21;"
+    assert "ISO-10303-21;" in out.decode()
 
 
 def test_codec_infile_and_outfile_arguments():
diff --git a/tests/test_step_codec.py b/tests/test_step_codec.py
index e7da516..478be12 100644
--- a/tests/test_step_codec.py
+++ b/tests/test_step_codec.py
@@ -17,4 +17,4 @@ def test_step_codec():
     ]
     out, err, exitcode = helpers.cli_call(command)
 
-    assert out.decode().split("\n")[0].replace("\r", "") == "ISO-10303-21;"
+    assert "ISO-10303-21;" in out.decode()