diff --git a/tests/nix-channel.sh b/tests/nix-channel.sh
index 0114566d7..b3442f6a8 100644
--- a/tests/nix-channel.sh
+++ b/tests/nix-channel.sh
@@ -49,7 +49,7 @@ clearManifests
 rm -f $TEST_ROOT/.nix-channels
 
 # Test updating from a tarball
-nix-channel --add file://$TEST_ROOT/foo/nixexprs.tar.bz2
+nix-channel --add file://$TEST_ROOT/foo/nixexprs.tar.bz2 foo
 nix-channel --update
 
 # Do a query.