diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 93077e3a..82d232df 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,6 +13,8 @@ jobs:
       matrix:
         include:
           # Recent Rubies and Rails
+          - ruby-version: '3.3'
+            rails-version: '7.2'
           - ruby-version: '3.2'
           - ruby-version: '3.1'
           - ruby-version: '3.0'
diff --git a/lib/rspec_api_documentation/client_base.rb b/lib/rspec_api_documentation/client_base.rb
index db0560a3..0e44e2f7 100644
--- a/lib/rspec_api_documentation/client_base.rb
+++ b/lib/rspec_api_documentation/client_base.rb
@@ -44,7 +44,7 @@ def process(method, path, params = {}, headers ={})
     end
 
     def read_request_body
-      input = last_request.env["rack.input"]
+      input = last_request.env["rack.input"]# || StringIO.new
       input.rewind
       input.read
     end