diff --git a/RNTester/Podfile b/RNTester/Podfile
index deb6b77c5b6..f14d1a20622 100644
--- a/RNTester/Podfile
+++ b/RNTester/Podfile
@@ -40,24 +40,31 @@ target 'RNTesterIntegrationTests' do
   pod 'React-RCTTest', :path => "./RCTTest"
 end
 
-if ENV['USE_FRAMEWORKS'] == '1'
+def frameworks_pre_install(installer)
   static_frameworks = ['FlipperKit', 'Flipper', 'Flipper-Folly',
       'CocoaAsyncSocket', 'ComponentKit', 'Flipper-DoubleConversion',
       'Flipper-Glog', 'Flipper-PeerTalk', 'Flipper-RSocket',
       'CocoaLibEvent', 'OpenSSL-Universal', 'boost-for-react-native']
 
-  pre_install do |installer|
-    Pod::Installer::Xcode::TargetValidator.send(:define_method, :verify_no_static_framework_transitive_dependencies) {}
-    installer.pod_targets.each do |pod|
-        if static_frameworks.include?(pod.name)
-          def pod.build_type
-            Pod::Target::BuildType.static_library
-          end
-        end
+  Pod::Installer::Xcode::TargetValidator.send(:define_method, :verify_no_static_framework_transitive_dependencies) {}
+  installer.pod_targets.each do |pod|
+    if static_frameworks.include?(pod.name)
+      def pod.build_type
+        Pod::Target::BuildType.static_library
       end
+    end
   end
 end
 
+def codegen_pre_install(installer)
+  system("../scripts/generate-native-modules-specs.sh")
+end
+
+pre_install do |installer|
+  frameworks_pre_install(installer) if ENV['USE_FRAMEWORKS'] == '1'
+  codegen_pre_install(installer) if ENV['USE_CODEGEN'] == '1'
+end
+
 post_install do |installer|
   flipper_post_install(installer)
 end