diff --git a/lib/faraday/adapter.rb b/lib/faraday/adapter.rb
index f3e6af7bf..a581166c6 100644
--- a/lib/faraday/adapter.rb
+++ b/lib/faraday/adapter.rb
@@ -78,8 +78,7 @@ def save_response(env, status, body, headers = nil, reason_phrase = nil, finishe
     # @param type [Symbol] Describes which timeout setting to get: :read,
     #                      :write, or :open.
     # @param options [Hash] Hash containing Symbol keys like :timeout,
-    #                       :read_timeout, :write_timeout, :open_timeout, or
-    #                       :timeout
+    #                       :read_timeout, :write_timeout, or :open_timeout
     #
     # @return [Integer, nil] Timeout duration in seconds, or nil if no timeout
     #                        has been set.
diff --git a/lib/faraday/adapter/test.rb b/lib/faraday/adapter/test.rb
index b8a5b28aa..7843d8c1a 100644
--- a/lib/faraday/adapter/test.rb
+++ b/lib/faraday/adapter/test.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'timeout'
+
 module Faraday
   class Adapter
     # @example
@@ -277,11 +279,22 @@ def call(env)
         end
 
         block_arity = stub.block.arity
+        params = if block_arity >= 0
+                   [env, meta].take(block_arity)
+                 else
+                   [env, meta]
+                 end
+
+        timeout = request_timeout(:open, env[:request])
+        timeout ||= request_timeout(:read, env[:request])
+
         status, headers, body =
-          if block_arity >= 0
-            stub.block.call(*[env, meta].take(block_arity))
+          if timeout
+            ::Timeout.timeout(timeout, Faraday::TimeoutError) do
+              stub.block.call(*params)
+            end
           else
-            stub.block.call(env, meta)
+            stub.block.call(*params)
           end
 
         # We need to explicitly pass `reason_phrase = nil` here to avoid keyword args conflicts.
diff --git a/spec/faraday/adapter/test_spec.rb b/spec/faraday/adapter/test_spec.rb
index bdeb6cdf9..117bb7899 100644
--- a/spec/faraday/adapter/test_spec.rb
+++ b/spec/faraday/adapter/test_spec.rb
@@ -410,4 +410,33 @@ def make_request
       end
     end
   end
+
+  describe 'request timeout' do
+    subject(:request) do
+      connection.get('/sleep') do |req|
+        req.options.timeout = timeout
+      end
+    end
+
+    before do
+      stubs.get('/sleep') do
+        sleep(0.01)
+        [200, {}, '']
+      end
+    end
+
+    context 'when request is within timeout' do
+      let(:timeout) { 1 }
+
+      it { expect(request.status).to eq 200 }
+    end
+
+    context 'when request is too slow' do
+      let(:timeout) { 0.001 }
+
+      it 'raises an exception' do
+        expect { request }.to raise_error(Faraday::TimeoutError)
+      end
+    end
+  end
 end