diff --git a/tests/substituter.sh b/tests/substituter.sh
index b244b30e8..94ae26472 100755
--- a/tests/substituter.sh
+++ b/tests/substituter.sh
@@ -16,6 +16,7 @@ if test $1 = "--query"; then
             echo 1
             echo "" # deriver
             echo 0 # nr of refs
+            echo 0 # download size
         else
             echo "bad command $cmd"
             exit 1
diff --git a/tests/substituter2.sh b/tests/substituter2.sh
index 401e7b7be..70f7d0943 100755
--- a/tests/substituter2.sh
+++ b/tests/substituter2.sh
@@ -15,6 +15,7 @@ if test $1 = "--query"; then
             echo 1
             echo "" # deriver
             echo 0 # nr of refs
+            echo 0 # download size
         else
             echo "bad command $cmd"
             exit 1