diff --git a/src/backend/EdFi.DataManagementService.Backend.Postgresql.Test.Integration/DatabaseTest.cs b/src/backend/EdFi.DataManagementService.Backend.Postgresql.Test.Integration/DatabaseTest.cs
index 865650588..f041e4fc7 100644
--- a/src/backend/EdFi.DataManagementService.Backend.Postgresql.Test.Integration/DatabaseTest.cs
+++ b/src/backend/EdFi.DataManagementService.Backend.Postgresql.Test.Integration/DatabaseTest.cs
@@ -24,7 +24,7 @@ public abstract class DatabaseTest : DatabaseTestBase
     public async Task ConnectionSetup()
     {
         Connection = await DataSource!.OpenConnectionAsync();
-        Transaction = await Connection.BeginTransactionAsync(IsolationLevel.Serializable);
+        Transaction = await Connection.BeginTransactionAsync(IsolationLevel.RepeatableRead);
     }
 
     [TearDown]
@@ -235,7 +235,7 @@ Func<NpgsqlConnection, NpgsqlTransaction, Task<U>> dbOperation2
         // Connection and transaction for the setup
         await using var connectionForSetup = await DataSource!.OpenConnectionAsync();
         await using var transactionForSetup = await connectionForSetup.BeginTransactionAsync(
-            IsolationLevel.Serializable
+            IsolationLevel.RepeatableRead
         );
 
         // Run the setup
@@ -250,7 +250,7 @@ Func<NpgsqlConnection, NpgsqlTransaction, Task<U>> dbOperation2
 
         // Connection and transaction managed in this method for DB transaction 1
         await using var connection1 = await DataSource!.OpenConnectionAsync();
-        await using var transaction1 = await connection1.BeginTransactionAsync(IsolationLevel.Serializable);
+        await using var transaction1 = await connection1.BeginTransactionAsync(IsolationLevel.RepeatableRead);
 
         // Use these for threads to signal each other for coordination
         using EventWaitHandle Transaction1Go = new AutoResetEvent(false);
@@ -271,7 +271,7 @@ Func<NpgsqlConnection, NpgsqlTransaction, Task<U>> dbOperation2
 
             // Step #3: Create new connection and begin DB transaction 2
             connection2 = await DataSource!.OpenConnectionAsync();
-            transaction2 = await connection2.BeginTransactionAsync(IsolationLevel.Serializable);
+            transaction2 = await connection2.BeginTransactionAsync(IsolationLevel.RepeatableRead);
 
             // Step #4: Signal to transaction 1 thread to continue in parallel
             Transaction1Go?.Set();
diff --git a/src/backend/EdFi.DataManagementService.Backend.Postgresql.Test.Integration/DeleteTests.cs b/src/backend/EdFi.DataManagementService.Backend.Postgresql.Test.Integration/DeleteTests.cs
index 14150a6a5..a6dd3d604 100644
--- a/src/backend/EdFi.DataManagementService.Backend.Postgresql.Test.Integration/DeleteTests.cs
+++ b/src/backend/EdFi.DataManagementService.Backend.Postgresql.Test.Integration/DeleteTests.cs
@@ -414,7 +414,7 @@ public async Task Setup()
             _upsertResults.Add(await CreateUpsert().Upsert(upsertRequest, Connection!, Transaction!));
 
             await Transaction!.CommitAsync();
-            Transaction = await Connection!.BeginTransactionAsync(IsolationLevel.Serializable);
+            Transaction = await Connection!.BeginTransactionAsync(IsolationLevel.RepeatableRead);
 
             _deleteResult = await CreateDeleteById()
                 .DeleteById(
@@ -489,7 +489,7 @@ public async Task Setup()
             _upsertResults.Add(await CreateUpsert().Upsert(upsertRequest, Connection!, Transaction!));
 
             await Transaction!.CommitAsync();
-            Transaction = await Connection!.BeginTransactionAsync(IsolationLevel.Serializable);
+            Transaction = await Connection!.BeginTransactionAsync(IsolationLevel.RepeatableRead);
 
             _deleteResult = await CreateDeleteById()
                 .DeleteById(
@@ -562,7 +562,7 @@ public async Task Setup()
 
             await Transaction!.CommitAsync();
 
-            Transaction = await Connection!.BeginTransactionAsync(IsolationLevel.Serializable);
+            Transaction = await Connection!.BeginTransactionAsync(IsolationLevel.RepeatableRead);
 
             _deleteResult = await CreateDeleteById()
                 .DeleteById(