diff --git a/docs/parser.md b/docs/parser.md
index 83965a4..56ddf4a 100644
--- a/docs/parser.md
+++ b/docs/parser.md
@@ -89,6 +89,9 @@ npm run format
 
 # Run parser against the given repository
 scripts/parse_repo.sh elixir-lang/elixir
+
+# Run parser against a predefined list of popular repositories
+scripts/integration_test.sh
 ```
 
 ## Implementation notes
diff --git a/grammar.js b/grammar.js
index 0e38673..d644186 100644
--- a/grammar.js
+++ b/grammar.js
@@ -58,8 +58,6 @@ const ATOM_OPERATOR_LITERALS = ALL_OPS.filter(
   (operator) => !/[a-z]/.test(operator) && operator !== "=>"
 );
 
-// Note that for keywords we use external scanner (KEYWORD_SPECIAL_LITERAL),
-// so it should be kept in sync
 const ATOM_SPECIAL_LITERALS = ["...", "%{}", "{}", "%", "<<>>", "..//"];
 
 // See Ref 6. in the docs
diff --git a/scripts/integration_test.sh b/scripts/integration_test.sh
new file mode 100755
index 0000000..93d1cc5
--- /dev/null
+++ b/scripts/integration_test.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -e
+
+cd "$(dirname "$0")/.."
+
+print_usage_and_exit() {
+  echo "Usage: $0"
+  echo ""
+  echo "Runs the parser against a predefined list of popular Elixir repositories"
+  echo ""
+  exit 1
+}
+
+if [ $# -ne 0 ]; then
+  print_usage_and_exit
+fi
+
+repos="elixir-lang/elixir elixir-lang/ex_doc elixir-plug/plug elixir-ecto/ecto dashbitco/broadway elixir-nx/nx elixir-nx/axon livebook-dev/livebook"
+
+for repo in $repos; do
+  ./scripts/parse_repo.sh $repo
+done
diff --git a/scripts/parse_repo.sh b/scripts/parse_repo.sh
index 6208b58..44e883b 100755
--- a/scripts/parse_repo.sh
+++ b/scripts/parse_repo.sh
@@ -26,7 +26,7 @@ dir="tmp/gh/${gh_repo//[\/-]/_}"
 
 if [[ ! -d "$dir" ]]; then
   mkdir -p "$(dirname "$dir")"
-  git clone "https://github.com/$gh_repo.git" "$dir"
+  git clone --depth 1 "https://github.com/$gh_repo.git" "$dir"
 fi
 
 echo "Running parser against $gh_repo"