diff --git a/tests/common.sh.in b/tests/common.sh.in
index 09f0c1c32..cdb84f4da 100644
--- a/tests/common.sh.in
+++ b/tests/common.sh.in
@@ -26,6 +26,12 @@ unset XDG_CACHE_HOME
 mkdir -p $TEST_HOME
 
 export PATH=@bindir@:$PATH
+if [[ -n "${NIX_CLIENT_PACKAGE:-}" ]]; then
+  export PATH="$NIX_CLIENT_PACKAGE/bin":$PATH
+fi
+if [[ -n "${NIX_DAEMON_PACKAGE:-}" ]]; then
+  export NIX_DAEMON_COMMAND="$NIX_DAEMON_PACKAGE/bin/nix-daemon"
+fi
 coreutils=@coreutils@
 
 export dot=@dot@