diff --git a/spec/datadog/tracing/contrib/rack/integration_test_spec.rb b/spec/datadog/tracing/contrib/rack/integration_test_spec.rb
index 15ce8bc28a..56453bc4e5 100644
--- a/spec/datadog/tracing/contrib/rack/integration_test_spec.rb
+++ b/spec/datadog/tracing/contrib/rack/integration_test_spec.rb
@@ -154,7 +154,7 @@
           end
         end
 
-        context 'with REQUEST_URI' do
+        context 'with REQUEST_URI being a path' do
           subject(:response) { get '/success?foo=bar', {}, 'REQUEST_URI' => '/success?foo=bar' }
 
           context 'and default quantization' do
@@ -186,6 +186,21 @@
               expect(span).to be_root_span
             end
           end
+
+          context 'and quantization activated for base' do
+            let(:rack_options) { { quantize: { base: :show } } }
+
+            it_behaves_like 'a rack GET 200 span'
+
+            it do
+              # Since REQUEST_URI is set (usually provided by WEBrick/Puma)
+              # it uses REQUEST_URI, which has query string parameters.
+              # The query string will not be quantized, per the option.
+              expect(span.get_tag('http.url')).to eq('http://example.org/success?foo')
+              expect(span.get_tag('http.base_url')).to be_nil
+              expect(span).to be_root_span
+            end
+          end
         end
 
         context 'with REQUEST_URI containing base URI' do
@@ -220,6 +235,21 @@
               expect(span).to be_root_span
             end
           end
+
+          context 'and quantization activated for base' do
+            let(:rack_options) { { quantize: { base: :show } } }
+
+            it_behaves_like 'a rack GET 200 span'
+
+            it do
+              # Since REQUEST_URI is set (usually provided by WEBrick/Puma)
+              # it uses REQUEST_URI, which has query string parameters.
+              # The query string will not be quantized, per the option.
+              expect(span.get_tag('http.url')).to eq('http://example.org/success?foo')
+              expect(span.get_tag('http.base_url')).to be_nil
+              expect(span).to be_root_span
+            end
+          end
         end
 
         context 'with sub-route' do