diff --git a/tests/client.rs b/tests/client.rs
index ce97456bf..6da05c133 100644
--- a/tests/client.rs
+++ b/tests/client.rs
@@ -235,12 +235,31 @@ async fn body_pipe_response() {
     assert_eq!(res2.status(), reqwest::StatusCode::OK);
 }
 
+fn set_proxy_exception(domain: &str) {
+    let mut exception_set = false;
+    // We add it to *all* potential lists.
+    for name in ["NO_PROXY", "no_proxy"] {
+        if let Ok(v) = std::env::var(name) {
+            // Add the domain if not already present
+            if ! v.split(',').any(|dmn| {dmn == domain}) {
+                std::env::set_var(name, format!("{v},{domain}"));
+            }
+            exception_set = true;
+        }
+    }
+    // If nothing was set, we create the defaut list, just in case
+    if !exception_set {
+        std::env::set_var("NO_PROXY", domain);
+    }
+}
+
 #[tokio::test]
 async fn overridden_dns_resolution_with_gai() {
     let _ = env_logger::builder().is_test(true).try_init();
     let server = server::http(move |_req| async { http::Response::new("Hello".into()) });
 
     let overridden_domain = "rust-lang.org";
+    set_proxy_exception(overridden_domain);
     let url = format!(
         "http://{overridden_domain}:{}/domain_override",
         server.addr().port()
@@ -263,6 +282,7 @@ async fn overridden_dns_resolution_with_gai_multiple() {
     let server = server::http(move |_req| async { http::Response::new("Hello".into()) });
 
     let overridden_domain = "rust-lang.org";
+    set_proxy_exception(overridden_domain);
     let url = format!(
         "http://{overridden_domain}:{}/domain_override",
         server.addr().port()
@@ -297,6 +317,7 @@ async fn overridden_dns_resolution_with_hickory_dns() {
     let server = server::http(move |_req| async { http::Response::new("Hello".into()) });
 
     let overridden_domain = "rust-lang.org";
+    set_proxy_exception(overridden_domain);
     let url = format!(
         "http://{overridden_domain}:{}/domain_override",
         server.addr().port()
@@ -321,6 +342,7 @@ async fn overridden_dns_resolution_with_hickory_dns_multiple() {
     let server = server::http(move |_req| async { http::Response::new("Hello".into()) });
 
     let overridden_domain = "rust-lang.org";
+    set_proxy_exception(overridden_domain);
     let url = format!(
         "http://{overridden_domain}:{}/domain_override",
         server.addr().port()