diff --git a/test/system/104-run.bats b/test/system/104-run.bats
index 117789657..035917c99 100644
--- a/test/system/104-run.bats
+++ b/test/system/104-run.bats
@@ -211,6 +211,7 @@ teardown() {
   assert [ ${#lines[@]} -gt 0 ]
   assert [ ${#stderr_lines[@]} -eq 0 ]
 
+  # shellcheck disable=SC1090
   source <(echo "$output")
   run echo "$name"
 
@@ -234,6 +235,7 @@ teardown() {
   assert [ ${#lines[@]} -gt 0 ]
   assert [ ${#stderr_lines[@]} -eq 0 ]
 
+  # shellcheck disable=SC1090
   source <(echo "$output")
   run echo "$name"
 
diff --git a/test/system/libs/helpers.bash b/test/system/libs/helpers.bash
index a905b351d..9ee702264 100644
--- a/test/system/libs/helpers.bash
+++ b/test/system/libs/helpers.bash
@@ -107,7 +107,7 @@ function _pull_and_cache_distro_image() {
     assert_success
   fi
 
-  for ((i = ${num_of_retries}; i > 0; i--)); do
+  for ((i = num_of_retries; i > 0; i--)); do
     run $SKOPEO copy --dest-compress docker://${image} dir:${IMAGE_CACHE_DIR}/${image_archive}
 
     if [ "$status" -eq 0 ]; then