diff --git a/Tests/CodexReleaseTests/MarketTests/ContractSuccessfulTest.cs b/Tests/CodexReleaseTests/MarketTests/ContractSuccessfulTest.cs
index 9aa22eab..9c1ab2e0 100644
--- a/Tests/CodexReleaseTests/MarketTests/ContractSuccessfulTest.cs
+++ b/Tests/CodexReleaseTests/MarketTests/ContractSuccessfulTest.cs
@@ -7,14 +7,8 @@ namespace CodexReleaseTests.MarketTests
     [TestFixture(6, 3, 1)]
     [TestFixture(6, 4, 2)]
     [TestFixture(8, 5, 1)]
-    [TestFixture(8, 5, 2)]
     [TestFixture(8, 6, 1)]
-    [TestFixture(8, 6, 2)]
     [TestFixture(8, 6, 3)]
-    [TestFixture(8, 8, 1)]
-    [TestFixture(8, 8, 2)]
-    [TestFixture(8, 8, 3)]
-    [TestFixture(8, 8, 4)]
     public class ContractSuccessfulTest : MarketplaceAutoBootstrapDistTest
     {
         public ContractSuccessfulTest(int hosts, int slots, int tolerance)
diff --git a/Tests/CodexReleaseTests/MarketTests/MultipleContractsTest.cs b/Tests/CodexReleaseTests/MarketTests/MultipleContractsTest.cs
index e217b280..672f9eee 100644
--- a/Tests/CodexReleaseTests/MarketTests/MultipleContractsTest.cs
+++ b/Tests/CodexReleaseTests/MarketTests/MultipleContractsTest.cs
@@ -7,16 +7,9 @@ namespace CodexReleaseTests.MarketTests
 {
     [TestFixture(6, 3, 1)]
     [TestFixture(6, 4, 1)]
-    [TestFixture(6, 4, 2)]
     [TestFixture(8, 5, 1)]
-    [TestFixture(8, 5, 2)]
     [TestFixture(8, 6, 1)]
-    [TestFixture(8, 6, 2)]
     [TestFixture(8, 6, 3)]
-    [TestFixture(8, 8, 1)]
-    [TestFixture(8, 8, 2)]
-    [TestFixture(8, 8, 3)]
-    [TestFixture(8, 8, 4)]
     public class MultipleContractsTest : MarketplaceAutoBootstrapDistTest
     {
         public MultipleContractsTest(int hosts, int slots, int tolerance)
@@ -40,7 +33,7 @@ namespace CodexReleaseTests.MarketTests
         [Test]
         [Combinatorial]
         public void MultipleContractGenerations(
-            [Values(5, 10)] int numGenerations)
+            [Values(10)] int numGenerations)
         {
             var hosts = StartHosts();
             var clients = StartClients();
diff --git a/Tests/CodexReleaseTests/Parallelism.cs b/Tests/CodexReleaseTests/Parallelism.cs
index a1b26c73..eb2da742 100644
--- a/Tests/CodexReleaseTests/Parallelism.cs
+++ b/Tests/CodexReleaseTests/Parallelism.cs
@@ -1,6 +1,6 @@
 using NUnit.Framework;
 
-[assembly: LevelOfParallelism(1)]
+[assembly: LevelOfParallelism(4)]
 namespace CodexReleaseTests.DataTests
 {
 }