diff --git a/tests/openssh_server/.gitattributes b/tests/openssh_server/.gitattributes
new file mode 100644
index 00000000..c4977be2
--- /dev/null
+++ b/tests/openssh_server/.gitattributes
@@ -0,0 +1,3 @@
+# OpenSSH requires LF EOLs in key files, even on Windows, where
+# a git checkout checkout may set CRLF EOLs by default.
+* text eol=lf