diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..1288fa7
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+  workflow_dispatch:
+
+env:
+  CI: 1
+  RUST_BACKTRACE: short
+  RUSTFLAGS: -D warnings
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - run: cargo test
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          components: clippy
+      - run: cargo clippy
+  fmt:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          components: rustfmt
+      - uses: actions-rust-lang/rustfmt@v1
diff --git a/src/course_database.rs b/src/course_database.rs
index 0ccd569..e91d1d5 100644
--- a/src/course_database.rs
+++ b/src/course_database.rs
@@ -1,9 +1,7 @@
 use anyhow::anyhow;
 use core::str::FromStr;
-use petgraph::graph::{DiGraph, NodeIndex};
-use petgraph::Graph;
+use petgraph::graph::{Graph, NodeIndex};
 use serde::Deserialize;
-use std::collections::HashMap;
 use std::fmt;
 use std::io::BufReader;
 
@@ -41,7 +39,7 @@ impl FromStr for CourseId {
     fn from_str(value: &str) -> Result<Self, Self::Err> {
         let mut pieces = value
             .split_whitespace()
-            .filter(|string| string.trim_start().len() != 0);
+            .filter(|string| !string.trim_start().is_empty());
 
         Ok(CourseId {
             subject_id: pieces
diff --git a/src/graph_widget.rs b/src/graph_widget.rs
index a9a72fd..7c4043e 100644
--- a/src/graph_widget.rs
+++ b/src/graph_widget.rs
@@ -42,7 +42,7 @@ where
     }
 
     fn state(&self) -> tree::State {
-        tree::State::new(State::default())
+        tree::State::new(State)
     }
 
     fn size(&self) -> Size<Length> {
diff --git a/src/lib.rs b/src/lib.rs
index 2cb4b94..14e459e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,5 @@
+#![allow(dead_code, unused_variables)]
+
 use iced::theme::Palette;
 use iced::widget::{button, column, container, horizontal_rule, row, text, text_input};
 use iced::{executor, Application, Color, Command, Element, Length, Theme};