diff --git a/.circleci/test-deploy.yml b/.circleci/test-deploy.yml
index caebb45..8d8f638 100644
--- a/.circleci/test-deploy.yml
+++ b/.circleci/test-deploy.yml
@@ -39,7 +39,8 @@ promotion_requires: &promotion_requires
     test-machine-latest,
     test-machine-old,
     test-build-command-workspace,
-    test-build-with-args
+    test-build-with-args,
+    test-build-bash-substitution
   ]
 
 filters: &filters
@@ -209,6 +210,20 @@ jobs:
           image: cpeorbtesting/docker-orb-test
           tag: $CIRCLE_BUILD_NUM-$CIRCLE_SHA1
           extra_build_args: --build-arg COMMIT_HASH=$CIRCLE_SHA1
+  test-build-bash-substitution:
+    docker:
+      - image: cimg/base:current
+    environment:
+      DOCKER_ACCOUNT: CPEOrbTesting
+      DOCKER_REPO: docker_orb_test
+    steps:
+      - checkout
+      - setup_remote_docker
+      - docker/build:
+          dockerfile: test3.Dockerfile
+          image: ${DOCKER_ACCOUNT,,}/${DOCKER_REPO,,/_/-}
+          tag: ${CIRCLE_BUILD_NUM,,}-${CIRCLE_SHA1:0:10}
+          extra_build_args: --build-arg COMMIT_HASH=$CIRCLE_SHA1
   test-dockerlint:
     docker:
       - image: cimg/node:17.7.2
@@ -307,6 +322,8 @@ workflows:
           filters: *filters
       - test-build-with-args:
           filters: *filters
+      - test-build-bash-substitution:
+          filters: *filters
 
       # begin test-install-docker-compose
       - test-install-docker-compose:
diff --git a/src/examples/with-bash-substitution.yml b/src/examples/with-bash-substitution.yml
new file mode 100644
index 0000000..e49d215
--- /dev/null
+++ b/src/examples/with-bash-substitution.yml
@@ -0,0 +1,15 @@
+description: >
+  Build/publish a Docker image bash substitution
+
+usage:
+  version: 2.1
+
+  orbs:
+    docker: circleci/docker@x.y.z
+
+  workflows:
+    build-docker-image-only:
+      jobs:
+        - docker/publish:
+            image:  ${CIRCLE_PROJECT_USERNAME,,}/${CIRCLE_PROJECT_REPONAME/_/-}
+            tag: ${CIRCLE_SHA1:0:10}
diff --git a/src/scripts/build.sh b/src/scripts/build.sh
index 55daf7c..d49167e 100644
--- a/src/scripts/build.sh
+++ b/src/scripts/build.sh
@@ -23,6 +23,8 @@ parse_tags_to_docker_arg() {
     fi
   done
 
+  # Set IFS to null to stop "," from breaking bash substitution
+  local IFS=
   DOCKER_TAGS_ARG="$(eval echo $docker_arg)"
 }
 
diff --git a/test3.Dockerfile b/test3.Dockerfile
index e0d8db5..cdc9a11 100644
--- a/test3.Dockerfile
+++ b/test3.Dockerfile
@@ -11,7 +11,6 @@ ARG COMMIT_HASH
 
 # Change default shell from Dash to Bash
 RUN rm /bin/sh && ln -s /bin/bash /bin/sh
-
 RUN if [[ "${COMMIT_HASH}" =~ ^[0-9a-f]{5,40}$ ]]; then \
     echo "Success: COMMIT_HASH is valid commit hash"; \
   else \