diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..12fd120
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,14 @@
+# Path-based git attributes
+# https://www.kernel.org/pub/software/scm/git/docs/gitattributes.html
+
+# Ignore all test and documentation with "export-ignore".
+/.github            export-ignore
+/.gitattributes     export-ignore
+/.gitignore         export-ignore
+/tests              export-ignore
+/.editorconfig      export-ignore
+/.php_cs.xml        export-ignore
+/codeception.yml    export-ignore
+/psalm.xml          export-ignore
+/psalm-baseline.xml export-ignore
+/UPGRADING.md       export-ignore