diff --git a/ntex/src/http/client/builder.rs b/ntex/src/http/client/builder.rs
index 2837f745..e648b303 100644
--- a/ntex/src/http/client/builder.rs
+++ b/ntex/src/http/client/builder.rs
@@ -55,6 +55,15 @@ impl ClientBuilder {
         self
     }
 
+    /// Use custom connection.  Mainly used for mocking connections.
+    /// # Note
+    /// This overrides anything set with [`Self::connector`].
+    pub fn connection(mut self, connection: impl super::connect::Connect + 'static) -> Self
+    {
+        self.config.connector = Box::new(connection);
+        self
+    }
+
     /// Set request timeout.
     ///
     /// Request timeout is the total time before a response must be received.
diff --git a/ntex/src/http/client/connect.rs b/ntex/src/http/client/connect.rs
index bd5a3096..975149c4 100644
--- a/ntex/src/http/client/connect.rs
+++ b/ntex/src/http/client/connect.rs
@@ -20,7 +20,7 @@ where
     }
 }
 
-pub(super) trait Connect: fmt::Debug {
+pub trait Connect: fmt::Debug {
     fn send_request(
         &self,
         head: RequestHeadType,
diff --git a/ntex/src/http/client/mod.rs b/ntex/src/http/client/mod.rs
index 053ffed5..2c655e4c 100644
--- a/ntex/src/http/client/mod.rs
+++ b/ntex/src/http/client/mod.rs
@@ -19,7 +19,7 @@
 use std::rc::Rc;
 
 mod builder;
-mod connect;
+pub mod connect;
 mod connection;
 mod connector;
 pub mod error;
@@ -74,12 +74,12 @@ pub struct Connect {
 pub struct Client(Rc<ClientConfig>);
 
 #[derive(Debug)]
-pub(crate) struct ClientConfig {
+pub struct ClientConfig {
     pub(self) connector: Box<dyn HttpConnect>,
-    pub(self) headers: HeaderMap,
-    pub(self) timeout: Millis,
-    pub(self) response_pl_limit: usize,
-    pub(self) response_pl_timeout: Millis,
+    pub headers: HeaderMap,
+    pub timeout: Millis,
+    pub response_pl_limit: usize,
+    pub response_pl_timeout: Millis,
 }
 
 impl Default for ClientConfig {