diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index e236792..e532bc9 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -45,3 +45,8 @@ jobs:
 
       - name: Run Cargo:test
         run: cargo test --verbose --all-features
+
+      - name: Run WASM tests
+        if: matrix.os == 'ubuntu-latest'
+        run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+        run: wasm-pack test --node -- --verbose --all-features
diff --git a/Cargo.toml b/Cargo.toml
index be9e921..59963e1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,14 +26,13 @@ json = ["dep:serde", "dep:serde_json"]
 futures-util = { version = "0.3", default-features = false, features = ["sink"] }
 reqwest = { version = "0.12", default-features = false }
 thiserror = "1"
-tokio-util = { version = "0.7", default-features = false, features = ["compat"] }
 tracing = "0.1"
-
 serde = { version = "1.0", default-features = false, optional = true }
 serde_json = { version = "1.0", default-features = false, optional = true, features = ["alloc"] }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 async-tungstenite = { version = "0.26", default-features = false }
+tokio-util = { version = "0.7", default-features = false, features = ["compat"] }
 tungstenite = { version = "0.23", default-features = false, features = ["handshake"] }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
@@ -41,6 +40,11 @@ web-sys = { version = "0.3", features = ["WebSocket", "CloseEvent", "ErrorEvent"
 tokio = { version = "1", default-features = false, features = ["sync", "macros"] }
 
 [dev-dependencies]
-tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
+tokio = { version = "1", features = ["macros", "rt"] }
 reqwest = { version = "0.12", features = ["default-tls"] }
 serde = { version = "1.0", features = ["derive"] }
+futures-util = { version = "0.3", default-features = false, features = ["sink", "alloc"] }
+
+[target.'cfg(target_arch = "wasm32")'.dev-dependencies]
+wasm-bindgen-test = "0.3"
+wasm-bindgen-futures = "0.4"
diff --git a/examples/hello_world.rs b/examples/hello_world.rs
index 1ef89ab..4e7b995 100644
--- a/examples/hello_world.rs
+++ b/examples/hello_world.rs
@@ -2,7 +2,7 @@ use futures_util::{SinkExt, StreamExt, TryStreamExt};
 use reqwest::Client;
 use reqwest_websocket::{Error, Message, RequestBuilderExt};
 
-#[tokio::main]
+#[tokio::main(flavor = "current_thread")]
 async fn main() -> Result<(), Error> {
     let websocket = Client::default()
         .get("wss://echo.websocket.org/")
@@ -14,7 +14,7 @@ async fn main() -> Result<(), Error> {
 
     let (mut tx, mut rx) = websocket.split();
 
-    tokio::spawn(async move {
+    tokio::task::spawn_local(async move {
         for i in 1..11 {
             tx.send(Message::Text(format!("Hello, World! #{i}")))
                 .await
diff --git a/src/json.rs b/src/json.rs
index 7c0eb61..55ad283 100644
--- a/src/json.rs
+++ b/src/json.rs
@@ -55,6 +55,7 @@ impl Message {
         match self {
             Self::Text(x) => serde_json::from_str(x).map_err(Into::into),
             Self::Binary(x) => serde_json::from_slice(x).map_err(Into::into),
+            #[allow(deprecated)]
             Self::Ping(_) | Self::Pong(_) | Self::Close { .. } => {
                 Err(serde_json::Error::custom("neither text nor binary").into())
             }
diff --git a/src/lib.rs b/src/lib.rs
index 3c6d61b..022808e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -236,6 +236,13 @@ impl WebSocket {
     }
 
     /// Closes the connection with a given code and (optional) reason.
+    ///
+    /// # WASM
+    ///
+    /// On wasm only `code` must be [`CloseCode::Normal`],
+    /// [`CloseCode::Iana(_)`], or [`CloseCode::Library(_)`]. Furthermore
+    /// `reason` must be at most 128 bytes long. Otherwise the call to
+    /// [`close`][Self::close] will fail.
     pub async fn close(self, code: CloseCode, reason: Option<&str>) -> Result<(), Error> {
         #[cfg(not(target_arch = "wasm32"))]
         {
@@ -301,9 +308,11 @@ impl Sink<Message> for WebSocket {
 }
 
 #[cfg(test)]
-mod tests {
+pub mod tests {
     use futures_util::{SinkExt, TryStreamExt};
     use reqwest::Client;
+    #[cfg(target_arch = "wasm32")]
+    use wasm_bindgen_test::wasm_bindgen_test;
 
     use super::{websocket, CloseCode, Message, RequestBuilderExt, WebSocket};
 
@@ -328,7 +337,8 @@ mod tests {
         panic!("didn't receive text back");
     }
 
-    #[tokio::test]
+    #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+    #[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
     async fn test_with_request_builder() {
         let websocket = Client::default()
             .get("https://echo.websocket.org/")
@@ -343,29 +353,33 @@ mod tests {
         test_websocket(websocket).await;
     }
 
-    #[tokio::test]
+    #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+    #[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
     async fn test_shorthand() {
         let websocket = websocket("https://echo.websocket.org/").await.unwrap();
         test_websocket(websocket).await;
     }
 
-    #[tokio::test]
+    #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+    #[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
     async fn test_with_ws_scheme() {
         let websocket = websocket("wss://echo.websocket.org/").await.unwrap();
 
         test_websocket(websocket).await;
     }
 
-    #[tokio::test]
+    #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+    #[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
     async fn test_close() {
         let websocket = websocket("https://echo.websocket.org/").await.unwrap();
         websocket
-            .close(CloseCode::Protocol, Some("test"))
+            .close(CloseCode::Normal, Some("test"))
             .await
             .expect("close returned an error");
     }
 
-    #[tokio::test]
+    #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+    #[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
     async fn test_send_close_frame() {
         let mut websocket = websocket("https://echo.websocket.org/").await.unwrap();
         websocket