diff --git a/spec/datadog/tracing/contrib/suite/integration_spec.rb b/spec/datadog/tracing/contrib/suite/integration_spec.rb
index eaf37eb1f8a..622a67088b0 100644
--- a/spec/datadog/tracing/contrib/suite/integration_spec.rb
+++ b/spec/datadog/tracing/contrib/suite/integration_spec.rb
@@ -8,7 +8,7 @@
 
 require 'rack'
 # `Rack::Handler::WEBrick` was extracted to the `rackup` gem in Rack 3.0
-require 'rackup' if Gem::Version.new(Rack::RELEASE) >= Gem::Version.new('3')
+require 'rackup/handler/webrick' if Gem::Version.new(Rack::RELEASE) >= Gem::Version.new('3')
 require 'webrick'
 
 RSpec.describe 'contrib integration testing', :integration do
@@ -164,7 +164,11 @@ def build(*dynamic_configurations)
             end
           end.to_app
 
-          server.mount '/', Rack::Handler::WEBrick, app
+          if Gem::Version.new(Rack::RELEASE) >= Gem::Version.new('3')
+            server.mount '/', Rackup::Handler::WEBrick, app
+          else
+            server.mount '/', Rack::Handler::WEBrick, app
+          end
 
           @thread = Thread.new { server.start }
           try_wait_until { started }