diff --git a/test/chronoscope/gemini/connection_client_test.exs b/test/chronoscope/gemini/connection_client_test.exs
new file mode 100644
index 0000000..c462204
--- /dev/null
+++ b/test/chronoscope/gemini/connection_client_test.exs
@@ -0,0 +1,59 @@
+defmodule Chronoscope.Gemini.ConnectionClientTest do
+  use Chronoscope.Case, async: true
+
+  alias Chronoscope.Certificate
+  alias Chronoscope.Gemini.ConnectionClient
+  alias Chronoscope.Gemini.Request
+  alias Chronoscope.SSLMock
+
+  import Mox
+
+  setup :verify_on_exit!
+
+  setup _tags do
+    resource = %{host: "localhost", port: 1965, path: "/"}
+
+    {:ok, %{resource: resource, request: Request.create(resource)}}
+  end
+
+  @timeout 3000
+
+  describe "Chronoscope.Gemini.ConnectClient.connect()" do
+    test "handles an empty response", %{resource: resource, request: request} do
+      SSLMock
+      |> expect(:connect, fn ~c"localhost", 1965, _tls_options, @timeout -> {:ok, :socket} end)
+      |> expect(:send, fn :socket, ^request -> send_ssl_response([]) end)
+      |> expect(:peercert, fn :socket -> {:ok, peercert()} end)
+      |> expect(:close, fn :socket -> :ok end)
+
+      assert ConnectionClient.connect(resource) == {:error, "bad response: "}
+    end
+
+    test "handles a good response", %{resource: resource, request: request} do
+      peercert = peercert()
+      peercert_expiration = Certificate.expiration_date(peercert)
+      response = "20 text/gemini\r\nHello\r\nWorld!\r\n"
+
+      SSLMock
+      |> expect(:connect, fn ~c"localhost", 1965, _tls_options, @timeout -> {:ok, :socket} end)
+      |> expect(:send, fn :socket, ^request -> send_ssl_response(response) end)
+      |> expect(:peercert, fn :socket -> {:ok, peercert} end)
+      |> expect(:close, fn :socket -> :ok end)
+
+      assert {:ok, %{cert_expiration: ^peercert_expiration, status_code: 20, meta: "text/gemini", body: "Hello\r\nWorld!\r\n"}} =
+               ConnectionClient.connect(resource)
+    end
+
+    test "handles a bad response", %{resource: resource, request: request} do
+      response = "HTTP/1.1 400 Bad Request\r\nServer: nginx\r\n"
+
+      SSLMock
+      |> expect(:connect, fn ~c"localhost", 1965, _tls_options, @timeout -> {:ok, :socket} end)
+      |> expect(:send, fn :socket, ^request -> send_ssl_response(response) end)
+      |> expect(:peercert, fn :socket -> {:ok, peercert()} end)
+      |> expect(:close, fn :socket -> :ok end)
+
+      assert {:error, "bad response: HTTP/1.1 400 Bad Request\r\nServer: nginx\r\n"} = ConnectionClient.connect(resource)
+    end
+  end
+end