diff --git a/lib/bypass/instance.ex b/lib/bypass/instance.ex
index f8ae2b1..74bfe2e 100644
--- a/lib/bypass/instance.ex
+++ b/lib/bypass/instance.ex
@@ -4,7 +4,7 @@ defmodule Bypass.Instance do
   use GenServer, restart: :transient
 
   import Bypass.Utils
-  import Plug.Router.Utils, only: [build_path_match: 1]
+  import Plug.Router.Utils, only: [build_path_match: 1, split: 1]
 
   def start_link(opts \\ []) do
     GenServer.start_link(__MODULE__, [opts])
@@ -297,7 +297,7 @@ defmodule Bypass.Instance do
   end
 
   defp route_info(method, path, %{expectations: expectations} = _state) do
-    segments = build_path_match(path) |> elem(1)
+    segments = path |> split
 
     route =
       expectations
diff --git a/test/bypass_test.exs b/test/bypass_test.exs
index 8c26cc8..71ec7d0 100644
--- a/test/bypass_test.exs
+++ b/test/bypass_test.exs
@@ -643,4 +643,15 @@ defmodule BypassTest do
       Bypass.open(:error)
     end
   end
+
+  test "path can contain colon" do
+    bypass = Bypass.open()
+
+    Bypass.expect(bypass, "POST", "/resources/:resource", fn conn ->
+      assert conn.params == %{ "resource" => ":resource" }
+      Plug.Conn.send_resp(conn, 200, "")
+    end)
+
+    assert {:ok, 200, ""} = request(bypass.port, "/resources/:resource")
+  end
 end