diff --git a/Cargo.lock b/Cargo.lock
index ed233cf..310a74a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -81,9 +81,9 @@ checksum = "2fd1289c04a9ea8cb22300a459a72a385d7c73d3259e2ed7dcb2af674838cfa9"
 
 [[package]]
 name = "clap"
-version = "4.5.46"
+version = "4.5.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c5e4fcf9c21d2e544ca1ee9d8552de13019a42aa7dbf32747fa7aaf1df76e57"
+checksum = "7eac00902d9d136acd712710d71823fb8ac8004ca445a89e73a41d45aa712931"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -91,9 +91,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.46"
+version = "4.5.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fecb53a0e6fcfb055f686001bc2e2592fa527efaf38dbe81a6a9563562e57d41"
+checksum = "2ad9bbf750e73b5884fb8a211a9424a1906c1e156724260fdae972f31d70e1d6"
 dependencies = [
  "anstream",
  "anstyle",
@@ -112,9 +112,9 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.5.45"
+version = "4.5.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14cb31bb0a7d536caef2639baa7fad459e15c3144efefa6dbd1c84562c4739f6"
+checksum = "bbfd7eae0b0f1a6e63d4b13c9c478de77c2eb546fba158ad50b4203dc24b9f9c"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -165,7 +165,7 @@ checksum = "34aa73646ffb006b8f5147f3dc182bd4bcb190227ce861fc4a4844bf8e3cb2c0"
 
 [[package]]
 name = "gh-grader-preview"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "clap",
@@ -212,9 +212,9 @@ checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
 
 [[package]]
 name = "js-sys"
-version = "0.3.77"
+version = "0.3.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1cfaf33c695fc6e08064efbc1f72ec937429614f25eef83af942d0e227c3a28f"
+checksum = "0c0b063578492ceec17683ef2f8c5e89121fbd0b172cbc280635ab7567db2738"
 dependencies = [
  "once_cell",
  "wasm-bindgen",
@@ -228,9 +228,9 @@ checksum = "6a82ae493e598baaea5209805c49bbf2ea7de956d50d7da0da1164f9c6d28543"
 
 [[package]]
 name = "log"
-version = "0.4.27"
+version = "0.4.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
+checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432"
 
 [[package]]
 name = "memchr"
@@ -399,20 +399,21 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.100"
+version = "0.2.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1edc8929d7499fc4e8f0be2262a241556cfc54a0bea223790e71446f2aab1ef5"
+checksum = "7e14915cadd45b529bb8d1f343c4ed0ac1de926144b746e2710f9cd05df6603b"
 dependencies = [
  "cfg-if",
  "once_cell",
  "wasm-bindgen-macro",
+ "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.100"
+version = "0.2.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f0a0651a5c2bc21487bde11ee802ccaf4c51935d0d3d42a6101f98161700bc6"
+checksum = "e28d1ba982ca7923fd01448d5c30c6864d0a14109560296a162f80f305fb93bb"
 dependencies = [
  "bumpalo",
  "log",
@@ -424,9 +425,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.100"
+version = "0.2.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fe63fc6d09ed3792bd0897b314f53de8e16568c2b3f7982f468c0bf9bd0b407"
+checksum = "7c3d463ae3eff775b0c45df9da45d68837702ac35af998361e2c84e7c5ec1b0d"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -434,9 +435,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.100"
+version = "0.2.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ae87ea40c9f689fc23f209965b6fb8a99ad69aeeb0231408be24920604395de"
+checksum = "7bb4ce89b08211f923caf51d527662b75bdc9c9c7aab40f86dcb9fb85ac552aa"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -447,9 +448,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.100"
+version = "0.2.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a05d73b933a847d6cccdda8f838a22ff101ad9bf93e33684f39c1f5f0eece3d"
+checksum = "f143854a3b13752c6950862c906306adb27c7e839f7414cec8fea35beab624c1"
 dependencies = [
  "unicode-ident",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 368d123..b52d63b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "gh-grader-preview"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2024"
 
 [dependencies]
diff --git a/flake.lock b/flake.lock
index 7f5bde3..b9cecae 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "crane": {
       "locked": {
-        "lastModified": 1755993354,
-        "narHash": "sha256-FCRRAzSaL/+umLIm3RU3O/+fJ2ssaPHseI2SSFL8yZU=",
+        "lastModified": 1756705356,
+        "narHash": "sha256-dpBFe8SqYKr7W6KN5QOVCr8N76SBKwTslzjw+4BVBVs=",
         "owner": "ipetkov",
         "repo": "crane",
-        "rev": "25bd41b24426c7734278c2ff02e53258851db914",
+        "rev": "305707bbc27d83aa1039378e91d7dd816f4cac10",
         "type": "github"
       },
       "original": {
@@ -22,11 +22,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1756126213,
-        "narHash": "sha256-iSmyMn8r5NJfTWEsp6R/5jmMHrVLnQ/icebYfNP5QnQ=",
+        "lastModified": 1756730985,
+        "narHash": "sha256-Uv5lLUZfFxQv6RHi1TqLTKso0j0eUVMQQwud29LTV/s=",
         "owner": "nix-community",
         "repo": "flakelight",
-        "rev": "4415f8e61c770441f01a5b2550da5815aeebe144",
+        "rev": "950121d809b75c32e73684b32ccba8d4e8a67703",
         "type": "github"
       },
       "original": {
@@ -41,11 +41,11 @@
         "flakelight": "flakelight"
       },
       "locked": {
-        "lastModified": 1756212791,
-        "narHash": "sha256-90/xH2TwrCluU3ROooeeBYNxpeRqdGDQQptiqZN6FlA=",
+        "lastModified": 1756817437,
+        "narHash": "sha256-O8xyYYBJucwHMnqjoaNFEDYPJQ5nzwnuXjPoW2TCvYo=",
         "owner": "accelbread",
         "repo": "flakelight-rust",
-        "rev": "ce31f0d6c3adea38a4d8011c5e0b55d16888f21e",
+        "rev": "af3cc6a17c210efb85d99ed3ea601f5d0b55b50f",
         "type": "github"
       },
       "original": {
@@ -56,11 +56,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1756288264,
-        "narHash": "sha256-Om8adB1lfkU7D33VpR+/haZ2gI5r3Q+ZbIPzE5sYnwE=",
+        "lastModified": 1756911493,
+        "narHash": "sha256-6n/n1GZQ/vi+LhFXMSyoseKdNfc2QQaSBXJdgamrbkE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ddd1826f294a0ee5fdc198ab72c8306a0ea73aa9",
+        "rev": "c6a788f552b7b7af703b1a29802a7233c0067908",
         "type": "github"
       },
       "original": {
diff --git a/src/grader.rs b/src/grader.rs
index 9fb7081..d990748 100644
--- a/src/grader.rs
+++ b/src/grader.rs
@@ -72,14 +72,16 @@ impl AutoGraderData {
 }
 
 impl TestCase {
-    pub fn check_output(&self, output: String) -> Result<bool> {
+    fn check_output(&self, output: String) -> Result<bool> {
         if let Some(ref expected_output) = self.output {
+            let expected_output = expected_output.replace("\r\n", "\n");
+
             match self.comparison {
-                ComparisonType::Included => Ok(output.contains(expected_output)),
-                ComparisonType::Excluded => Ok(!output.contains(expected_output)),
+                ComparisonType::Included => Ok(output.contains(&expected_output)),
+                ComparisonType::Excluded => Ok(!output.contains(&expected_output)),
                 ComparisonType::Exact => Ok(output.trim() == expected_output.trim()),
                 ComparisonType::Regex => {
-                    let re = regex::Regex::new(expected_output)?;
+                    let re = regex::Regex::new(&expected_output)?;
                     Ok(re.is_match(&output))
                 }
                 ComparisonType::Pass => Ok(true),
@@ -94,7 +96,8 @@ impl TestCase {
             runner::setup_phase(setup)?;
         }
         let res = runner::run_phase(&self.run, &self.input, self.timeout as u64)?;
-        let matches = self.check_output(res.stdout.clone())?;
+        let output = res.stdout.replace("\r\n", "\n");
+        let matches = self.check_output(output)?;
         Ok((matches, res))
     }
 }