diff --git a/src/check b/src/check
index f90cc88..b1a3b38 100755
--- a/src/check
+++ b/src/check
@@ -4,4 +4,4 @@ set -eu
 
 [ -e /opt/resource/common ] && cd /opt/resource
 . ./common
-jq --null-input --arg version "$(crane digest "$REPOSITORY:$TAG")" '[{"digest": $version}]' | jq -r tostring
+jq -r --null-input --arg version "$(crane digest "$REPOSITORY:$TAG")" '[{"digest": $version}] | tostring'
diff --git a/src/common b/src/common
index 9d848b1..4f128a4 100755
--- a/src/common
+++ b/src/common
@@ -32,7 +32,7 @@ split_repo_domain() {
 
     if [ -z "$domain_part" ]; then
         domain_part="$DEFAULT_DOMAIN"
-        other_part="$other_part"
+        # other_part="$other_part"
     elif echo "$domain_part" | grep -Evq '\.|:' && [ "$domain_part" != 'localhost' ]; then
         # ^ docker sourcecode checks if $domain_part == $domain_part.lower() in effect checking if all is lower case
         domain_part="$DEFAULT_DOMAIN"
diff --git a/src/in b/src/in
index 4e192f0..bdb8e5f 100755
--- a/src/in
+++ b/src/in
@@ -9,6 +9,6 @@ oci_dir="$(mktemp -d)"
 crane pull --format=oci "$REPOSITORY:@$(jq -r .version "$INPUT_FILE")" "$oci_dir"
 cd "$oci_dir"
 tar cf "$1/image.tar" ./*
-cd - 1>&2
+cd - 1>&2 2>/dev/null
 
-jq .version < "$INPUT_FILE" | jq -r tostring
+jq -r '.version | tostring' < "$INPUT_FILE"
diff --git a/src/out b/src/out
index 223fa0d..937843c 100755
--- a/src/out
+++ b/src/out
@@ -9,6 +9,6 @@ IMAGE_REFS_FILE="$(mktemp -t)"
 oci_dir="$(mktemp -d)"
 cd "$oci_dir"
 tar xf "$1/$(jq -r .params.image < "$INPUT_FILE")"
-cd - 1>&2
+cd - 1>&2 2>/dev/null
 crane push "$oci_dir" "$REPOSITORY:$TAG" --image-refs="$IMAGE_REFS_FILE"
-jq --null-input --arg version "$(sed 's/^[^@]*@//' < "$IMAGE_REFS_FILE")" '{"digest": $version}' | jq -r tostring
+jq -r --null-input --arg version "$(sed 's/^[^@]*@//' < "$IMAGE_REFS_FILE")" '{"digest": $version} | tostring'