diff --git a/docs/abra/hack.md b/docs/abra/hack.md
index 29cb921..9fb2e6c 100644
--- a/docs/abra/hack.md
+++ b/docs/abra/hack.md
@@ -33,6 +33,7 @@ apt install bats bats-assert bats-support jq make git
 Then you can run the integration test suite with the following:
 
 ```
+export ABRA_DIR="$HOME/.abra_test"
 bats tests/integration --timing --pretty
 ```