diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4f4be75..2a265c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,9 @@ This may lead to no listed changes for a version.
 
 ## [Unreleased]
 
+### Fixed
+* Use the default port when checking for the right port.
+
 ## [3.3.19] - 2025-09-18
 
 ### Fixed
diff --git a/src/main.rs b/src/main.rs
index 64f2e48..dea16c4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -591,16 +591,14 @@ where
             return Err((PROXY_REQUEST_REFUSED, "Proxy request refused"));
         }
 
-        // correct port
+        // Validate that the port in the URL is the same as for the stream this request
+        // came in on.
         if let Some(expected_port) = self.local_port_check
-            && let Some(port) = url.port()
+            && url.port().unwrap_or(DEFAULT_PORT) != expected_port
         {
-            // Validate that the port in the URL is the same as for the stream this request
-            // came in on.
-            if port != expected_port {
-                return Err((PROXY_REQUEST_REFUSED, "Proxy request refused"));
-            }
+            return Err((PROXY_REQUEST_REFUSED, "Proxy request refused"));
         }
+
         Ok(url)
     }
 
diff --git a/tests/tests.rs b/tests/tests.rs
index 64e964d..92c978e 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -36,6 +36,7 @@ static PORT: AtomicU16 = AtomicU16::new(DEFAULT_PORT);
 struct Server {
     addr: SocketAddr,
     server: std::process::Child,
+    port: u16,
     // is set when output is collected by stop()
     output: Option<Result<(), String>>,
 }
@@ -44,11 +45,10 @@ impl Server {
     pub fn new(args: &[&str]) -> Self {
         use std::net::{IpAddr, Ipv4Addr};
 
+        let port = PORT.fetch_add(1, Ordering::SeqCst);
+
         // generate unique port/address so tests do not clash
-        let addr = (
-            IpAddr::V4(Ipv4Addr::LOCALHOST),
-            PORT.fetch_add(1, Ordering::SeqCst),
-        )
+        let addr = (IpAddr::V4(Ipv4Addr::LOCALHOST), port)
             .to_socket_addrs()
             .unwrap()
             .next()
@@ -84,6 +84,7 @@ impl Server {
         Self {
             addr,
             server,
+            port,
             output: None,
         }
     }
@@ -147,7 +148,12 @@ impl Drop for Server {
 fn get(args: &[&str], url: &str) -> Result<Response, String> {
     let mut server = Server::new(args);
 
-    let url = Url::parse(url).unwrap();
+    let mut url = Url::parse(url).unwrap();
+    if url.port().is_none() {
+        // inject port number into URL because that is only determined
+        // when constructing the `Server` above.
+        url.set_port(Some(server.port)).unwrap();
+    }
     let actor = Actor::default().proxy("localhost".into(), server.addr.port());
     let request = actor.get(url);