diff --git a/plugins/builder-cnb/builder-build b/plugins/builder-cnb/builder-build
index 8ef42adfa..22f98900f 100755
--- a/plugins/builder-cnb/builder-build
+++ b/plugins/builder-cnb/builder-build
@@ -13,7 +13,6 @@ trigger-builder-cnb-builder-build() {
     return
   fi
 
-
   local stack="$(plugn trigger buildpack-stack-name "$APP")"
   if [[ -z "$stack" ]]; then
     DOKKU_CNB_STACK="$stack"
@@ -32,7 +31,7 @@ trigger-builder-cnb-builder-build() {
   local TMP_FILE=$(mktemp "/tmp/dokku-${DOKKU_PID}-${FUNCNAME[0]}.XXXXXX")
   trap "rm -rf '$TMP_FILE' >/dev/null" RETURN INT TERM
 
-  config_export app "$APP" --format envfile --merged > "$TMP_FILE"
+  config_export app "$APP" --format envfile --merged >"$TMP_FILE"
 
   plugn trigger pre-build-cnb "$APP" "$SOURCECODE_WORK_DIR"
 
diff --git a/plugins/domains/functions b/plugins/domains/functions
index 64bfcdea7..4c2874f08 100755
--- a/plugins/domains/functions
+++ b/plugins/domains/functions
@@ -54,7 +54,7 @@ domains_add() {
   done
 
   for DOMAIN in "$@"; do
-    if grep -x --line-regexp --fixed-strings "$DOMAIN" "$APP_VHOST_PATH" 2> /dev/null; then
+    if grep -x --line-regexp --fixed-strings "$DOMAIN" "$APP_VHOST_PATH" 2>/dev/null; then
       dokku_log_info1 "Skipping: $DOMAIN already added to $APP"
     else
       echo "$DOMAIN" >>"$APP_VHOST_PATH"
@@ -149,7 +149,7 @@ domains_add_global() {
   done
 
   for DOMAIN in "$@"; do
-    if grep -q --line-regexp --fixed-strings "$DOMAIN" "$GLOBAL_VHOST_PATH" 2> /dev/null; then
+    if grep -q --line-regexp --fixed-strings "$DOMAIN" "$GLOBAL_VHOST_PATH" 2>/dev/null; then
       dokku_log_info1 "Skipping $DOMAIN: already added"
     else
       echo "$DOMAIN" >>"$GLOBAL_VHOST_PATH"
diff --git a/plugins/git/internal-functions b/plugins/git/internal-functions
index 95af4eeca..4b1384a76 100755
--- a/plugins/git/internal-functions
+++ b/plugins/git/internal-functions
@@ -11,7 +11,7 @@ cmd-git-allow-host() {
   declare HOST="$1"
   [[ -z "$HOST" ]] && dokku_log_fail "Please supply a git host"
 
-  ssh-keyscan -t rsa "$HOST" >> "$DOKKU_ROOT/.ssh/known_hosts"
+  ssh-keyscan -t rsa "$HOST" >>"$DOKKU_ROOT/.ssh/known_hosts"
   dokku_log_info1 "$HOST added to known hosts"
 }
 
@@ -215,19 +215,19 @@ fn-git-fetch() {
   fi
 
   DOKKU_DEPLOY_BRANCH="$(fn-git-deploy-branch "$APP")"
-  if ! git -C  "$APP_ROOT" check-ref-format --branch "$DOKKU_DEPLOY_BRANCH" >/dev/null 2>&1; then
+  if ! git -C "$APP_ROOT" check-ref-format --branch "$DOKKU_DEPLOY_BRANCH" >/dev/null 2>&1; then
     echo $'\e[1G\e[K'"-----> WARNING: Invalid branch name '$DOKKU_DEPLOY_BRANCH' specified via DOKKU_DEPLOY_BRANCH."
     echo $'\e[1G\e[K'"-----> For more details, please see the man page for 'git-check-ref-format.'"
     return
   fi
 
-  git -C  "$APP_ROOT" remote rm remote > /dev/null 2>&1 || true
-  git -C  "$APP_ROOT" remote add --mirror=fetch --no-tags remote "$GIT_REMOTE"
+  git -C "$APP_ROOT" remote rm remote > /dev/null 2>&1 || true
+  git -C "$APP_ROOT" remote add --mirror=fetch --no-tags remote "$GIT_REMOTE"
   if [[ -z "$GIT_REF" ]]; then
-    git -C  "$APP_ROOT" fetch --update-head-ok remote "$DOKKU_DEPLOY_BRANCH"
+    git -C "$APP_ROOT" fetch --update-head-ok remote "$DOKKU_DEPLOY_BRANCH"
   else
-    git -C  "$APP_ROOT" fetch --update-head-ok remote
-    git -C  "$APP_ROOT" update-ref "refs/heads/$DOKKU_DEPLOY_BRANCH" "$GIT_REF"
+    git -C "$APP_ROOT" fetch --update-head-ok remote
+    git -C "$APP_ROOT" update-ref "refs/heads/$DOKKU_DEPLOY_BRANCH" "$GIT_REF"
   fi
 }
 
diff --git a/tests/ci/setup.sh b/tests/ci/setup.sh
index aff1e503e..1ce8ddc36 100755
--- a/tests/ci/setup.sh
+++ b/tests/ci/setup.sh
@@ -77,7 +77,7 @@ install_dokku() {
     build_dokku
   fi
 
-  cat << EOF | sudo debconf-set-selections
+  cat <<EOF | sudo debconf-set-selections
 dokku dokku/hostname string dokku.me
 dokku dokku/key_file string /root/.ssh/id_rsa.pub
 dokku dokku/nginx_enable boolean true
diff --git a/tests/unit/test_helper.bash b/tests/unit/test_helper.bash
index 816fa98a4..e65eb0894 100644
--- a/tests/unit/test_helper.bash
+++ b/tests/unit/test_helper.bash
@@ -510,14 +510,14 @@ add_release_command() {
   local APP="$1"
   local APP_REPO_DIR="$2"
   [[ -z "$APP" ]] && local APP="$TEST_APP"
-  echo "release: touch /app/release.test" >> "$APP_REPO_DIR/Procfile"
+  echo "release: touch /app/release.test" >>"$APP_REPO_DIR/Procfile"
 }
 
 add_requirements_txt() {
   local APP="$1"
   local APP_REPO_DIR="$2"
   [[ -z "$APP" ]] && local APP="$TEST_APP"
-  echo "flask" >> "$APP_REPO_DIR/requirements.txt"
+  echo "flask" >>"$APP_REPO_DIR/requirements.txt"
 }
 
 build_nginx_config() {