diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 835f0fd..5ca05d9 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -31,7 +31,6 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    # installing pylyzer itself is required for the tests
     - name: Build
       run: |
         rustup update stable
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..aec82da
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,71 @@
+name: Test
+
+on:
+  push:
+    branches: [main]
+    paths-ignore:
+      - "docs/**"
+      - "images/**"
+      - "**.md"
+      - "**.yml"
+      - "LICENSE-**"
+      - ".gitmessage"
+      - ".pre-commit-config.yaml"
+  pull_request:
+    branches: [main]
+    paths-ignore:
+      - "docs/**"
+      - "images/**"
+      - "**.md"
+      - "**.yml"
+      - "LICENSE-**"
+      - ".pre-commit-config.yaml"
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  package-test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install
+      run: |
+        rustup update stable
+        cargo install --path .
+    - name: boto3
+      run: |
+        pip install boto3
+        pylyzer -c "import boto3"
+        echo "OK: boto3"
+    - name: urllib3
+      run: |
+        pip install urllib3
+        pylyzer -c "import urllib3"
+        echo "OK: urllib3"
+    - name: setuptools
+      run: |
+        pip install setuptools
+        pylyzer -c "import setuptools"
+        echo "OK: setuptools"
+    - name: requests
+      run: |
+        pip install requests
+        pylyzer -c "import requests"
+        echo "OK: requests"
+    - name: certifi
+      run: |
+        pip install certifi
+        pylyzer -c "import certifi"
+        echo "OK: certifi"
+    - name: charset-normalizer
+      run: |
+        pip install charset-normalizer
+        pylyzer -c "import charset_normalizer"
+        echo "OK: charset-normalizer"
+    - name: idna
+      run: |
+        pip install idna
+        pylyzer -c "import idna"
+        echo "OK: idna"
diff --git a/Cargo.lock b/Cargo.lock
index e8e4f69..1d812e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -145,9 +145,9 @@ checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
 
 [[package]]
 name = "els"
-version = "0.1.54-nightly.5"
+version = "0.1.55-nightly.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdc6282121d9e2871553e0731cfb88119cbfe76ce8aab08ac2be01f5644e3bee"
+checksum = "53cd4fb020c2357f6710be6e23a9a6b62fbf43c91ad2121d20f1afd0cde82a40"
 dependencies = [
  "erg_common",
  "erg_compiler",
@@ -159,9 +159,9 @@ dependencies = [
 
 [[package]]
 name = "erg_common"
-version = "0.6.42-nightly.5"
+version = "0.6.43-nightly.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0dfc622cc65f230a05a284a21f62c8f4a3c964c51c97881cc4e01202ef2a3c0"
+checksum = "2a59a52380300a8cd0e73c400d6568b80ccced5a55076c1e28fa2f28fda980d0"
 dependencies = [
  "backtrace-on-stack-overflow",
  "erg_proc_macros",
@@ -171,9 +171,9 @@ dependencies = [
 
 [[package]]
 name = "erg_compiler"
-version = "0.6.42-nightly.5"
+version = "0.6.43-nightly.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42247c4ab1eb33ed3e2e9e74f4773565eba4491f76bfbda4b965015938704ca1"
+checksum = "98ba16deaf1fe89b180453da6fe28471869502ffd289ef8996ef935f6151ef63"
 dependencies = [
  "erg_common",
  "erg_parser",
@@ -181,9 +181,9 @@ dependencies = [
 
 [[package]]
 name = "erg_parser"
-version = "0.6.42-nightly.5"
+version = "0.6.43-nightly.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c921c178517c2071e45418e8c5b35e0c3a19021e4459283fd8f6997b89ba216"
+checksum = "f42d83ee9069552150616e49fa5fa7ea08da8aebee7837b843161ce484d42adc"
 dependencies = [
  "erg_common",
  "erg_proc_macros",
@@ -192,9 +192,9 @@ dependencies = [
 
 [[package]]
 name = "erg_proc_macros"
-version = "0.6.42-nightly.5"
+version = "0.6.43-nightly.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1381ca7a7a0781834cb1d617cd8361cca23f880cb9c515d249905d585832734"
+checksum = "b8c49d659d539d72b99227ea870f0c1f5b30fb5c7cbc944931363f4dd4b26028"
 dependencies = [
  "quote",
  "syn 1.0.109",
diff --git a/Cargo.toml b/Cargo.toml
index ceb75b2..46ef2d4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,9 +24,9 @@ edition = "2021"
 repository = "https://github.com/mtshiba/pylyzer"
 
 [workspace.dependencies]
-erg_common = { version = "0.6.42-nightly.5", features = ["py_compat", "els"] }
-erg_compiler = { version = "0.6.42-nightly.5", features = ["py_compat", "els"] }
-els = { version = "0.1.54-nightly.5", features = ["py_compat"] }
+erg_common = { version = "0.6.43-nightly.1", features = ["py_compat", "els"] }
+erg_compiler = { version = "0.6.43-nightly.1", features = ["py_compat", "els"] }
+els = { version = "0.1.55-nightly.1", features = ["py_compat"] }
 # rustpython-parser = { version = "0.3.0", features = ["all-nodes-with-ranges", "location"] }
 # rustpython-ast = { version = "0.3.0", features = ["all-nodes-with-ranges", "location"] }
 rustpython-parser = { git = "https://github.com/RustPython/Parser", version = "0.4.0", features = ["all-nodes-with-ranges", "location"] }
diff --git a/docs/options/options.md b/docs/options/options.md
index 93b5f6d..be8bd98 100644
--- a/docs/options/options.md
+++ b/docs/options/options.md
@@ -26,3 +26,20 @@ $ pylyzer -c "print('hello world')"
 Start checking: string
 All checks OK: string
 ```
+
+## --disable
+
+Disable a default LSP feature.
+Default (disableable) features are:
+
+* codeAction
+* codeLens
+* completion
+* diagnostics
+* findReferences
+* gotoDefinition
+* hover
+* inlayHint
+* rename
+* semanticTokens
+* signatureHelp