diff --git a/index.js b/index.js
index 3c144ad..6925862 100644
--- a/index.js
+++ b/index.js
@@ -392,6 +392,9 @@ class GithubScm extends Scm {
             command.push(`${gitWrapper} "git fetch origin ${prRef}"`);
             // Merge a pull request with pipeline branch
             command.push(`${gitWrapper} "git merge ${config.sha}"`);
+            // Init & Update submodule
+            command.push(`${gitWrapper} "git submodule init"`);
+            command.push(`${gitWrapper} "git submodule update --recursive"`);
             command.push(`export GIT_BRANCH=origin/refs/${prRef}`);
         } else {
             command.push(`export GIT_BRANCH=origin/${branch}`);
diff --git a/test/data/customPrCommands.json b/test/data/customPrCommands.json
index 107a0ee..2b262dc 100644
--- a/test/data/customPrCommands.json
+++ b/test/data/customPrCommands.json
@@ -1,4 +1,4 @@
 {
     "name": "sd-checkout-code",
-    "command": "echo Exporting environment variables && if [ ! -z $SCM_CLONE_TYPE ] && [ $SCM_CLONE_TYPE = ssh ]; then export SCM_URL=git@github.com:screwdriver-cd/guide; elif [ ! -z $SCM_USERNAME ] && [ ! -z $SCM_ACCESS_TOKEN ]; then export SCM_URL=https://$SCM_USERNAME:$SCM_ACCESS_TOKEN@github.com/screwdriver-cd/guide; else export SCM_URL=https://github.com/screwdriver-cd/guide; fi && export GIT_URL=$SCM_URL.git && export GIT_MERGE_AUTOEDIT=no && echo Setting user name and user email && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git config --global user.name pqrs\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git config --global user.email dev-null@my.email.com\" && echo Cloning github.com/screwdriver-cd/guide, on branch branchName && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git clone --recursive --quiet --progress --branch branchName $SCM_URL $SD_SOURCE_DIR\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git reset --hard branchName --\" && echo Reset to branchName && echo Fetching PR and merging with branchName && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git fetch origin pull/3/head:pr\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git merge 12345\" && export GIT_BRANCH=origin/refs/pull/3/head:pr"
+    "command": "echo Exporting environment variables && if [ ! -z $SCM_CLONE_TYPE ] && [ $SCM_CLONE_TYPE = ssh ]; then export SCM_URL=git@github.com:screwdriver-cd/guide; elif [ ! -z $SCM_USERNAME ] && [ ! -z $SCM_ACCESS_TOKEN ]; then export SCM_URL=https://$SCM_USERNAME:$SCM_ACCESS_TOKEN@github.com/screwdriver-cd/guide; else export SCM_URL=https://github.com/screwdriver-cd/guide; fi && export GIT_URL=$SCM_URL.git && export GIT_MERGE_AUTOEDIT=no && echo Setting user name and user email && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git config --global user.name pqrs\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git config --global user.email dev-null@my.email.com\" && echo Cloning github.com/screwdriver-cd/guide, on branch branchName && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git clone --recursive --quiet --progress --branch branchName $SCM_URL $SD_SOURCE_DIR\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git reset --hard branchName --\" && echo Reset to branchName && echo Fetching PR and merging with branchName && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git fetch origin pull/3/head:pr\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git merge 12345\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git submodule init\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git submodule update --recursive\" && export GIT_BRANCH=origin/refs/pull/3/head:pr"
 }
diff --git a/test/data/prCommands.json b/test/data/prCommands.json
index 7937471..23425e3 100644
--- a/test/data/prCommands.json
+++ b/test/data/prCommands.json
@@ -1,4 +1,4 @@
 {
     "name": "sd-checkout-code",
-    "command": "echo Exporting environment variables && if [ ! -z $SCM_CLONE_TYPE ] && [ $SCM_CLONE_TYPE = ssh ]; then export SCM_URL=git@github.com:screwdriver-cd/guide; elif [ ! -z $SCM_USERNAME ] && [ ! -z $SCM_ACCESS_TOKEN ]; then export SCM_URL=https://$SCM_USERNAME:$SCM_ACCESS_TOKEN@github.com/screwdriver-cd/guide; else export SCM_URL=https://github.com/screwdriver-cd/guide; fi && export GIT_URL=$SCM_URL.git && export GIT_MERGE_AUTOEDIT=no && echo Setting user name and user email && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git config --global user.name sd-buildbot\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git config --global user.email dev-null@screwdriver.cd\" && echo Cloning github.com/screwdriver-cd/guide, on branch branchName && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git clone --recursive --quiet --progress --branch branchName $SCM_URL $SD_SOURCE_DIR\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git reset --hard branchName --\" && echo Reset to branchName && echo Fetching PR and merging with branchName && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git fetch origin pull/3/head:pr\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git merge 12345\" && export GIT_BRANCH=origin/refs/pull/3/head:pr"
+    "command": "echo Exporting environment variables && if [ ! -z $SCM_CLONE_TYPE ] && [ $SCM_CLONE_TYPE = ssh ]; then export SCM_URL=git@github.com:screwdriver-cd/guide; elif [ ! -z $SCM_USERNAME ] && [ ! -z $SCM_ACCESS_TOKEN ]; then export SCM_URL=https://$SCM_USERNAME:$SCM_ACCESS_TOKEN@github.com/screwdriver-cd/guide; else export SCM_URL=https://github.com/screwdriver-cd/guide; fi && export GIT_URL=$SCM_URL.git && export GIT_MERGE_AUTOEDIT=no && echo Setting user name and user email && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git config --global user.name sd-buildbot\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git config --global user.email dev-null@screwdriver.cd\" && echo Cloning github.com/screwdriver-cd/guide, on branch branchName && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git clone --recursive --quiet --progress --branch branchName $SCM_URL $SD_SOURCE_DIR\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git reset --hard branchName --\" && echo Reset to branchName && echo Fetching PR and merging with branchName && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git fetch origin pull/3/head:pr\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git merge 12345\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git submodule init\" && $(if git --version > /dev/null 2>&1; then echo 'eval'; else echo 'sd-step exec core/git'; fi) \"git submodule update --recursive\" && export GIT_BRANCH=origin/refs/pull/3/head:pr"
 }