diff --git a/backend/Testing/SyncReverseProxy/SendReceiveServiceTests.cs b/backend/Testing/SyncReverseProxy/SendReceiveServiceTests.cs
index ad24ea302..23892f5eb 100644
--- a/backend/Testing/SyncReverseProxy/SendReceiveServiceTests.cs
+++ b/backend/Testing/SyncReverseProxy/SendReceiveServiceTests.cs
@@ -230,7 +230,7 @@ ... on DbError {
         HgRunner.Run("""hg commit -m "first commit" """, sendReceiveParams.DestDir, 1, progress);
 
         //add a bunch of small files, must be in separate commits otherwise hg runs out of memory. But we want the push to be large
-        const int totalSizeMb = 180;
+        const int totalSizeMb = 150;
         const int fileCount = 10;
         for (int i = 1; i <= fileCount; i++)
         {