diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 5244865..da6f853 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -1,5 +1,11 @@
-on: push
-name: New workflow
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+name: Link Check
 jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
diff --git a/entrypoint.sh b/entrypoint.sh
index 3903bef..b205ee0 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -20,32 +20,35 @@ echo -e "${BLUE}USE_VERBOSE_MODE: $2${NC}"
 echo -e "${BLUE}FOLDER_PATH: $4${NC}"
 echo -e "${BLUE}MAX_DEPTH: $5${NC}"
 
-FIND_CALL="find ${FOLDER_PATH} -name \*.md -not -path './node_modules/*' -exec markdown-link-check {}"
+declare -a FIND_CALL
+
+if [ "$5" -ne -1 ]; then
+   FIND_CALL=('find' "${FOLDER_PATH}" '-name' '*.md' '-not' '-path' './node_modules/*' '-maxdepth' "${MAX_DEPTH}" '-exec' 'markdown-link-check' '{}')
+else
+   FIND_CALL=('find' "${FOLDER_PATH}" '-name' '*.md' '-not' '-path' './node_modules/*' '-exec' 'markdown-link-check' '{}')
+fi
 
 if [ -f "$CONFIG_FILE" ]; then
    echo -e "${BLUE}Using markdown-link-check configuration file: ${YELLOW}$CONFIG_FILE${NC}"
-   FIND_CALL+=" --config ${CONFIG_FILE}"
+   FIND_CALL+=('--config' "${CONFIG_FILE}")
 else
    echo -e "${BLUE}Cannot find ${YELLOW}$CONFIG_FILE${NC}"
    echo -e "${YELLOW}NOTE: See https://github.com/tcort/markdown-link-check#config-file-format to know more about"
    echo -e "customizing markdown-link-check by using a configuration file.${NC}"
 fi
-if [ "$5" -ne -1 ]; then
-   FIND_CALL+=" --maxdepth ${MAX_DEPTH}"
-fi
 
 if [ "$USE_QUIET_MODE" = "yes" ]; then
-   FIND_CALL+=" -q"
+   FIND_CALL+=('-q')
 fi
 
 if [ "$USE_VERBOSE_MODE" = "yes" ]; then
-   FIND_CALL+=" -v"
+   FIND_CALL+=('-v')
 fi
 
-FIND_CALL+=" \; &>> error.txt"
+FIND_CALL+=(';')
 
 set -x
-eval "$FIND_CALL"
+"${FIND_CALL[@]}" &>> error.txt
 set +x
 
 if [ -e error.txt ] ; then
diff --git a/md/md-level-1/level-1a.md b/md/md-level-1/level-1a.md
new file mode 100644
index 0000000..1930c4d
--- /dev/null
+++ b/md/md-level-1/level-1a.md
@@ -0,0 +1,25 @@
+
+## Test internal and external links
+
+www.google.com
+
+[This is a broken link](https://www.exampleexample.cox)
+
+[This is another broken link](http://ignored-domain.com) but its ignored using a
+configuration file. 
+
+### Alpha
+
+This [exists](#alpha).
+This [one does not](#does-not).
+References and definitions are [checked][alpha] [too][charlie].
+
+### Bravo
+
+Headings in `readme.md` are [not checked](file1.md#bravo).
+But [missing files are reported](missing-example.js).
+
+[alpha]: #alpha
+[charlie]: #charlie
+
+External file: [Charlie](./file2.md/#charlie)
\ No newline at end of file
diff --git a/md/md-level-1/level-1b.md b/md/md-level-1/level-1b.md
new file mode 100644
index 0000000..cb065f9
--- /dev/null
+++ b/md/md-level-1/level-1b.md
@@ -0,0 +1,10 @@
+# Checking more links
+
+## Bravo
+
+This [doesn't exists](#alpha).
+This [one does](#bravo).
+
+## Charlie
+
+This is linked from file1.
\ No newline at end of file
diff --git a/md/md-level-1/md-level-2/level-2a.md b/md/md-level-1/md-level-2/level-2a.md
new file mode 100644
index 0000000..1930c4d
--- /dev/null
+++ b/md/md-level-1/md-level-2/level-2a.md
@@ -0,0 +1,25 @@
+
+## Test internal and external links
+
+www.google.com
+
+[This is a broken link](https://www.exampleexample.cox)
+
+[This is another broken link](http://ignored-domain.com) but its ignored using a
+configuration file. 
+
+### Alpha
+
+This [exists](#alpha).
+This [one does not](#does-not).
+References and definitions are [checked][alpha] [too][charlie].
+
+### Bravo
+
+Headings in `readme.md` are [not checked](file1.md#bravo).
+But [missing files are reported](missing-example.js).
+
+[alpha]: #alpha
+[charlie]: #charlie
+
+External file: [Charlie](./file2.md/#charlie)
\ No newline at end of file
diff --git a/md/md-level-1/md-level-2/level-2b.md b/md/md-level-1/md-level-2/level-2b.md
new file mode 100644
index 0000000..cb065f9
--- /dev/null
+++ b/md/md-level-1/md-level-2/level-2b.md
@@ -0,0 +1,10 @@
+# Checking more links
+
+## Bravo
+
+This [doesn't exists](#alpha).
+This [one does](#bravo).
+
+## Charlie
+
+This is linked from file1.
\ No newline at end of file