diff --git a/pre-commit/1-json-syntax.sh b/pre-commit/1-json-syntax.sh
index 8394430..42b2a84 100755
--- a/pre-commit/1-json-syntax.sh
+++ b/pre-commit/1-json-syntax.sh
@@ -18,7 +18,7 @@ function test_file {
     # Set +e before and -e after for _optional_ linters (i.e.: that will only
     # output messages upon commit, e.g.: style linters).
     set -e
-    jsonlint -c "$file"
+    jsonlint "$file"
     set +e
   else
     echo "Can't run JSON syntax linter because the jsonlint executable isn't in the PATH."
diff --git a/pre-commit/2-css-style.sh b/pre-commit/2-css-style-csslint.sh
similarity index 89%
rename from pre-commit/2-css-style.sh
rename to pre-commit/2-css-style-csslint.sh
index 1bd9376..d5a4048 100755
--- a/pre-commit/2-css-style.sh
+++ b/pre-commit/2-css-style-csslint.sh
@@ -11,7 +11,7 @@ function test_file {
   fi
 
   if which -s csslint ; then
-    echo "Running CSS style lint..."
+    echo "Running CSS style lint with csslint..."
 
     # Set -e before and +e after for _required_ linters (i.e.: that will prevent
     # commit, e.g.: syntax linters).
@@ -27,7 +27,7 @@ function test_file {
 
 case "${1}" in
   --about )
-    echo "CSS style lint."
+    echo "CSS style lint (with csslint)."
     ;;
 
   * )
diff --git a/pre-commit/2-css-style-stylelint.sh b/pre-commit/2-css-style-stylelint.sh
new file mode 100755
index 0000000..297f5de
--- /dev/null
+++ b/pre-commit/2-css-style-stylelint.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+# shellcheck disable=SC2034
+GREP_OPTIONS=""
+
+function test_file {
+  file="${1}"
+
+  if [ ! -f "${file}" ] ; then
+    return
+  fi
+
+  if which -s stylelint ; then
+    echo "Running CSS style lint with stylelint..."
+
+    # Set -e before and +e after for _required_ linters (i.e.: that will prevent
+    # commit, e.g.: syntax linters).
+    # Set +e before and -e after for _optional_ linters (i.e.: that will only
+    # output messages upon commit, e.g.: style linters).
+    set +e
+    stylelint "$file"
+    set -e
+  else
+    echo "Can't run the CSS style linter because the stylelint executable isn't in the PATH."
+  fi
+}
+
+case "${1}" in
+  --about )
+    echo "CSS style lint (with stylelint)."
+    ;;
+
+  * )
+    for file in $(git diff-index --cached --name-only HEAD | grep -E '\.(css)') ; do
+      test_file "${file}"
+    done
+    ;;
+esac
diff --git a/pre-commit/2-drupal-style.sh b/pre-commit/2-drupal-style.sh
index ebf7caa..8c27d37 100755
--- a/pre-commit/2-drupal-style.sh
+++ b/pre-commit/2-drupal-style.sh
@@ -31,7 +31,7 @@ case "${1}" in
     ;;
 
   * )
-    for file in $(git diff-index --cached --name-only HEAD | grep -E '\.(php|inc|module|install|profile|test)') ; do
+    for file in $(git diff-index --cached --name-only HEAD | grep -E '\.(php|inc|module|theme|profile|install|test|js|css|yml)') ; do
       test_file "${file}"
     done
     ;;
diff --git a/pre-commit/3-drupal-practice.sh b/pre-commit/3-drupal-practice.sh
index 675b2ba..a704935 100755
--- a/pre-commit/3-drupal-practice.sh
+++ b/pre-commit/3-drupal-practice.sh
@@ -31,7 +31,7 @@ case "${1}" in
     ;;
 
   * )
-    for file in $(git diff-index --cached --name-only HEAD | grep -E '\.(php|inc|module|install|profile|test)') ; do
+    for file in $(git diff-index --cached --name-only HEAD | grep -E '\.(php|inc|module|theme|profile|install|test|yml)') ; do
       test_file "${file}"
     done
     ;;