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-rw-r--r--test/test.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/test.h b/test/test.h
index 78fa26b43..5e030f0cc 100644
--- a/test/test.h
+++ b/test/test.h
@@ -36,7 +36,7 @@ extern void check_mxf_audio_file (boost::filesystem::path ref, boost::filesystem
extern void check_xml (boost::filesystem::path, boost::filesystem::path, std::list<std::string>);
extern void check_file (boost::filesystem::path, boost::filesystem::path);
extern void check_ffmpeg (boost::filesystem::path, boost::filesystem::path, int audio_tolerance);
-extern void check_image (boost::filesystem::path, boost::filesystem::path);
+extern void check_image (boost::filesystem::path, boost::filesystem::path, double threshold = 0.01);
extern boost::filesystem::path test_film_dir (std::string);
extern void write_image (boost::shared_ptr<const Image> image, boost::filesystem::path file, std::string format);
boost::filesystem::path dcp_file (boost::shared_ptr<const Film> film, std::string prefix);