diff --git a/EssentialApp/EssentialApp.xcworkspace/xcshareddata/xcschemes/CI_iOS.xcscheme b/EssentialApp/EssentialApp.xcworkspace/xcshareddata/xcschemes/CI_iOS.xcscheme
index b5f14ef4..37505d43 100644
--- a/EssentialApp/EssentialApp.xcworkspace/xcshareddata/xcschemes/CI_iOS.xcscheme
+++ b/EssentialApp/EssentialApp.xcworkspace/xcshareddata/xcschemes/CI_iOS.xcscheme
@@ -139,6 +139,12 @@
             ReferencedContainer = "container:../EssentialFeed/EssentialFeed.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
+      <CommandLineArguments>
+         <CommandLineArgument
+            argument = "-com.apple.CoreData.ConcurrencyDebug 1"
+            isEnabled = "YES">
+         </CommandLineArgument>
+      </CommandLineArguments>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"