diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RubyClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RubyClientCodegen.java
index 83b020f7b8c..40b2d9c22ee 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RubyClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RubyClientCodegen.java
@@ -239,7 +239,6 @@ public class RubyClientCodegen extends AbstractRubyCodegen {
         supportingFiles.add(new SupportingFile("gem.mustache", libFolder, gemName + ".rb"));
         String gemFolder = libFolder + File.separator + gemName;
         supportingFiles.add(new SupportingFile("api_error.mustache", gemFolder, "api_error.rb"));
-        supportingFiles.add(new SupportingFile("configuration.mustache", gemFolder, "configuration.rb"));
         supportingFiles.add(new SupportingFile("version.mustache", gemFolder, "version.rb"));
         supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
         supportingFiles.add(new SupportingFile("git_push.sh.mustache", "", "git_push.sh"));
diff --git a/samples/client/petstore/ruby-faraday/.openapi-generator/FILES b/samples/client/petstore/ruby-faraday/.openapi-generator/FILES
index 8003747d27b..94c0e36ec23 100644
--- a/samples/client/petstore/ruby-faraday/.openapi-generator/FILES
+++ b/samples/client/petstore/ruby-faraday/.openapi-generator/FILES
@@ -68,7 +68,6 @@ lib/petstore/api/user_api.rb
 lib/petstore/api_client.rb
 lib/petstore/api_error.rb
 lib/petstore/configuration.rb
-lib/petstore/configuration.rb
 lib/petstore/models/additional_properties_class.rb
 lib/petstore/models/animal.rb
 lib/petstore/models/api_response.rb
diff --git a/samples/client/petstore/ruby/.openapi-generator/FILES b/samples/client/petstore/ruby/.openapi-generator/FILES
index 8003747d27b..94c0e36ec23 100644
--- a/samples/client/petstore/ruby/.openapi-generator/FILES
+++ b/samples/client/petstore/ruby/.openapi-generator/FILES
@@ -68,7 +68,6 @@ lib/petstore/api/user_api.rb
 lib/petstore/api_client.rb
 lib/petstore/api_error.rb
 lib/petstore/configuration.rb
-lib/petstore/configuration.rb
 lib/petstore/models/additional_properties_class.rb
 lib/petstore/models/animal.rb
 lib/petstore/models/api_response.rb
diff --git a/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/.openapi-generator/FILES b/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/.openapi-generator/FILES
index b6d67848c71..113a62913f3 100644
--- a/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/.openapi-generator/FILES
+++ b/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/.openapi-generator/FILES
@@ -12,7 +12,6 @@ lib/x_auth_id_alias/api/usage_api.rb
 lib/x_auth_id_alias/api_client.rb
 lib/x_auth_id_alias/api_error.rb
 lib/x_auth_id_alias/configuration.rb
-lib/x_auth_id_alias/configuration.rb
 lib/x_auth_id_alias/version.rb
 spec/api_client_spec.rb
 spec/configuration_spec.rb
diff --git a/samples/openapi3/client/features/dynamic-servers/ruby/.openapi-generator/FILES b/samples/openapi3/client/features/dynamic-servers/ruby/.openapi-generator/FILES
index 2eaa447daa0..acdf7ab2391 100644
--- a/samples/openapi3/client/features/dynamic-servers/ruby/.openapi-generator/FILES
+++ b/samples/openapi3/client/features/dynamic-servers/ruby/.openapi-generator/FILES
@@ -13,7 +13,6 @@ lib/dynamic_servers/api/usage_api.rb
 lib/dynamic_servers/api_client.rb
 lib/dynamic_servers/api_error.rb
 lib/dynamic_servers/configuration.rb
-lib/dynamic_servers/configuration.rb
 lib/dynamic_servers/version.rb
 spec/api_client_spec.rb
 spec/configuration_spec.rb
diff --git a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/.openapi-generator/FILES b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/.openapi-generator/FILES
index 6599ee36fec..f2383908cab 100644
--- a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/.openapi-generator/FILES
+++ b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/.openapi-generator/FILES
@@ -14,7 +14,6 @@ lib/petstore/api/usage_api.rb
 lib/petstore/api_client.rb
 lib/petstore/api_error.rb
 lib/petstore/configuration.rb
-lib/petstore/configuration.rb
 lib/petstore/models/array_alias.rb
 lib/petstore/models/map_alias.rb
 lib/petstore/version.rb