diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000000..82694d81f27
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,8 @@
+*.pck binary
+Lib/test/cjkencodings/* binary
+Lib/test/decimaltestdata/*.decTest binary
+Lib/test/sndhdrdata/sndhdr.* binary
+Lib/test/test_email/data/msg_26.txt binary
+Lib/test/xmltestdata/* binary
+Lib/venv/scripts/nt/* binary
+Lib/test/coding20731.py binary