diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..06e901a
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,8 @@
+docker/Dockerfile-*	linguist-language=Dockerfile
+m4/*			linguist-vendored
+t/t???/*		linguist-detectable=false
+t/chainlint.sed		linguist-vendored
+t/test-lib.sh		linguist-vendored
+t/test-lib-functions.sh	linguist-vendored
+tap-driver.sh		linguist-vendored
+test-driver		linguist-vendored