diff --git a/.travis.yml b/.travis.yml
index cbee8a1e..5dc73074 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,18 @@
+#### DO NOT MODIFY. THIS FILE IS AUTOGENERATED ####
+
 dist: trusty
 sudo: required
 
 language: generic
 
-script: ./test-build.sh $NODE_VERSION
+services:
+    - docker
+addons:
+  apt:
+    packages:
+      - docker-ce
+
+script: ./test-build.sh $NODE_VERSION $VARIANT
 
 jobs:
   include:
@@ -28,28 +37,129 @@ jobs:
           packages:
             - shellcheck
 
+    # Docker Build #
     - stage: Build
-      services:
-          - docker
-      addons:
-        apt:
-          packages:
-            - docker-ce
       env:
-        - NODE_VERSION: '4'
+         - NODE_VERSION: "4"
+         - VARIANT: "default"
 
     - stage: Build
       env:
-        - NODE_VERSION: '6'
+         - NODE_VERSION: "4"
+         - VARIANT: "alpine"
 
     - stage: Build
       env:
-        - NODE_VERSION: '8'
+         - NODE_VERSION: "4"
+         - VARIANT: "onbuild"
 
     - stage: Build
       env:
-        - NODE_VERSION: '9'
+         - NODE_VERSION: "4"
+         - VARIANT: "slim"
 
     - stage: Build
       env:
-        - NODE_VERSION: 'chakracore/8'
+         - NODE_VERSION: "4"
+         - VARIANT: "stretch"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "4"
+         - VARIANT: "wheezy"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "6"
+         - VARIANT: "default"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "6"
+         - VARIANT: "alpine"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "6"
+         - VARIANT: "onbuild"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "6"
+         - VARIANT: "slim"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "6"
+         - VARIANT: "stretch"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "6"
+         - VARIANT: "wheezy"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "8"
+         - VARIANT: "default"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "8"
+         - VARIANT: "alpine"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "8"
+         - VARIANT: "onbuild"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "8"
+         - VARIANT: "slim"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "8"
+         - VARIANT: "stretch"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "8"
+         - VARIANT: "wheezy"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "9"
+         - VARIANT: "default"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "9"
+         - VARIANT: "alpine"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "9"
+         - VARIANT: "onbuild"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "9"
+         - VARIANT: "slim"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "9"
+         - VARIANT: "stretch"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "9"
+         - VARIANT: "wheezy"
+
+    - stage: Build
+      env:
+         - NODE_VERSION: "chakracore/8"
+         - VARIANT: "default"
+
diff --git a/functions.sh b/functions.sh
index 175c1396..8e309767 100755
--- a/functions.sh
+++ b/functions.sh
@@ -201,7 +201,7 @@ function sort_versions () {
 	local sorted
 	local lines
 	local line
-	
+
 	IFS=$'\n'
 	lines="${versions[*]}"
 	unset IFS
diff --git a/travis.yml.template b/travis.yml.template
new file mode 100644
index 00000000..4aecb7a5
--- /dev/null
+++ b/travis.yml.template
@@ -0,0 +1,38 @@
+dist: trusty
+sudo: required
+
+language: generic
+
+services:
+    - docker
+addons:
+  apt:
+    packages:
+      - docker-ce
+
+script: ./test-build.sh $NODE_VERSION $VARIANT
+
+jobs:
+  include:
+    - stage: Test
+      env:
+        - TEST: Doc Toc Check
+      language: node_js
+      install: npm i -g doctoc
+      script:
+        - cp README.md README.md.tmp &&
+          doctoc --title='## Table of Contents' --github README.md &&
+          diff -q README.md README.md.tmp
+
+    - stage: Test
+      env:
+        - TEST: Shell Check
+      script: shellcheck *.sh
+      addons:
+        apt:
+          sources:
+            - debian-sid
+          packages:
+            - shellcheck
+
+    # Docker Build #
diff --git a/update.sh b/update.sh
index 7d349114..214524a0 100755
--- a/update.sh
+++ b/update.sh
@@ -52,10 +52,27 @@ function update_node_version {
 	)
 }
 
+function add_stage {
+	local baseuri=$1
+	shift
+	local version=$1
+	shift
+	local variant=$1
+	shift
+
+	echo '    - stage: Build
+      env:
+         - NODE_VERSION: "'"$version"'"
+         - VARIANT: "'"$variant"'"
+' >> .travis.yml
+}
+
+echo '#### DO NOT MODIFY. THIS FILE IS AUTOGENERATED ####
+' | cat - travis.yml.template > .travis.yml
+
 for version in "${versions[@]}"; do
-{
 	# Skip "docs" and other non-docker directories
-	[ -f "$version/Dockerfile" ] || exit
+	[ -f "$version/Dockerfile" ] || continue
 
 	info "Updating version $version..."
 
@@ -63,21 +80,19 @@ for version in "${versions[@]}"; do
 	versionnum=$(basename "$version")
 	baseuri=$(get_config "$parentpath" "baseuri")
 
-	update_node_version "$baseuri" "$versionnum" "$parentpath/Dockerfile.template" "$version/Dockerfile"
+	add_stage "$baseuri" "$version" "default"
+	update_node_version "$baseuri" "$versionnum" "$parentpath/Dockerfile.template" "$version/Dockerfile" &
 
 	# Get supported variants according the target architecture
 	# See details in function.sh
 	variants=$(get_variants "$parentpath")
 
 	for variant in $variants; do
-	{
 		# Skip non-docker directories
-		[ -f "$version/$variant/Dockerfile" ] || exit
-		update_node_version "$baseuri" "$versionnum" "$parentpath/Dockerfile-$variant.template" "$version/$variant/Dockerfile" "$variant"
-	} &
+		[ -f "$version/$variant/Dockerfile" ] || continue
+		add_stage "$baseuri" "$version" "$variant"
+		update_node_version "$baseuri" "$versionnum" "$parentpath/Dockerfile-$variant.template" "$version/$variant/Dockerfile" "$variant" &
 	done
-	wait
-} &
 done
 
 wait