diff --git a/ProjectPlugins/CodexContractsPlugin/TestTokenExtensions.cs b/ProjectPlugins/CodexContractsPlugin/TestTokenExtensions.cs
index e94032a..ddd6675 100644
--- a/ProjectPlugins/CodexContractsPlugin/TestTokenExtensions.cs
+++ b/ProjectPlugins/CodexContractsPlugin/TestTokenExtensions.cs
@@ -46,6 +46,16 @@ namespace CodexContractsPlugin
             return new TestToken(a.TstWei + b.TstWei);
         }
 
+        public static TestToken operator -(TestToken a, TestToken b)
+        {
+            return new TestToken(a.TstWei - b.TstWei);
+        }
+
+        public static TestToken operator *(TestToken a, int b)
+        {
+            return new TestToken(a.TstWei * b);
+        }
+
         public static bool operator <(TestToken a, TestToken b)
         {
             return a.TstWei < b.TstWei;
diff --git a/Tests/CodexReleaseTests/MarketTests/ContractSuccessfulTest.cs b/Tests/CodexReleaseTests/MarketTests/ContractSuccessfulTest.cs
index 3151984..bddfbcd 100644
--- a/Tests/CodexReleaseTests/MarketTests/ContractSuccessfulTest.cs
+++ b/Tests/CodexReleaseTests/MarketTests/ContractSuccessfulTest.cs
@@ -1,11 +1,7 @@
 using CodexContractsPlugin;
 using CodexPlugin;
+using GethPlugin;
 using NUnit.Framework;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using Utils;
 
 namespace CodexReleaseTests.MarketTests
@@ -15,14 +11,135 @@ namespace CodexReleaseTests.MarketTests
     {
         private const int NumberOfHosts = 4;
         private const int FilesizeMb = 10;
+        private const int PricePerSlotPerSecondTSTWei = 10;
 
         [Test]
         public void ContractSuccessful()
         {
             var hosts = StartHosts();
-
             var client = StartCodex(s => s.WithName("client"));
 
+            var contract = CreateStorageRequest(client);
+
+            contract.WaitForStorageContractSubmitted();
+            AssertContractIsOnChain(contract);
+
+            contract.WaitForStorageContractStarted();
+            var slotFills = AssertContractSlotsAreFilledByHosts(contract, hosts);
+
+            contract.WaitForStorageContractFinished();
+            AssertClientHasPaidForContract(client, contract);
+            AssertHostsWerePaidForContract(contract, hosts, slotFills);
+            AssertHostsCollateralsAreUnchanged(hosts);
+        }
+
+        private void AssertContractIsOnChain(IStoragePurchaseContract contract)
+        {
+            AssertOnChainEvents(events =>
+            {
+                var onChainRequests = events.GetStorageRequests();
+                if (onChainRequests.Any(r => r.Id == contract.PurchaseId)) return;
+                throw new Exception($"OnChain request {contract.PurchaseId} not found...");
+            }, nameof(AssertContractIsOnChain));
+        }
+
+        private SlotFill[] AssertContractSlotsAreFilledByHosts(IStoragePurchaseContract contract, ICodexNodeGroup hosts)
+        {
+            var activeHosts = new Dictionary<int, SlotFill>();
+
+            Time.Retry(() =>
+            {
+                var fills = GetOnChainSlotFills(hosts, contract.PurchaseId);
+                foreach (var fill in fills)
+                {
+                    var index = (int)fill.SlotFilledEvent.SlotIndex;
+                    if (!activeHosts.ContainsKey(index))
+                    {
+                        activeHosts.Add(index, fill);
+                    }
+                }
+
+                if (activeHosts.Count != contract.Purchase.MinRequiredNumberOfNodes) throw new Exception("Not all slots were filled...");
+
+            }, nameof(AssertContractSlotsAreFilledByHosts));
+
+            return activeHosts.Values.ToArray();
+        }
+
+        private void AssertClientHasPaidForContract(ICodexNode client, IStoragePurchaseContract contract)
+        {
+            var balance = GetContracts().GetTestTokenBalance(client);
+            var expectedBalance = StartingBalanceTST.Tst() - GetContractTotalCost();
+
+            Assert.That(balance, Is.EqualTo(expectedBalance));
+        }
+
+        private TestToken GetContractTotalCost()
+        {
+            return GetContractCostPerSlot() * NumberOfHosts;
+        }
+
+        private TestToken GetContractCostPerSlot()
+        {
+            var duration = GetContractDuration();
+            return PricePerSlotPerSecondTSTWei.TstWei() * ((int)duration.TotalSeconds);
+        }
+
+        private void AssertHostsWerePaidForContract(IStoragePurchaseContract contract, ICodexNodeGroup hosts, SlotFill[] fills)
+        {
+            var expectedBalances = new Dictionary<EthAddress, TestToken>();
+            foreach (var host in hosts) expectedBalances.Add(host.EthAddress, StartingBalanceTST.Tst());
+            foreach (var fill in fills)
+            {
+                expectedBalances[fill.Host.EthAddress] += GetContractCostPerSlot();
+            }
+
+            foreach (var pair in expectedBalances)
+            {
+                var balance = GetContracts().GetTestTokenBalance(pair.Key);
+                Assert.That(balance, Is.EqualTo(pair.Value));
+            }
+        }
+
+        private void AssertHostsCollateralsAreUnchanged(ICodexNodeGroup hosts)
+        {
+            // There is no separate collateral location yet.
+            // All host balances should be equal to or greater than the starting balance.
+            foreach (var host in hosts)
+            {
+                Assert.That(GetContracts().GetTestTokenBalance(host), Is.GreaterThanOrEqualTo(StartingBalanceTST.Tst()));
+            }
+        }
+
+        private void AssertOnChainEvents(Action<ICodexContractsEvents> onEvents, string description)
+        {
+            Time.Retry(() =>
+            {
+                var events = GetContracts().GetEvents(GetTestRunTimeRange());
+                onEvents(events);
+            }, description);
+        }
+
+        private IStoragePurchaseContract CreateStorageRequest(ICodexNode client)
+        {
+            var cid = client.UploadFile(GenerateTestFile(FilesizeMb.MB()));
+            var config = GetContracts().Deployment.Config;
+            return client.Marketplace.RequestStorage(new StoragePurchaseRequest(cid)
+            {
+                Duration = GetContractDuration(),
+                Expiry = TimeSpan.FromSeconds(((double)config.Proofs.Period) * 1.0),
+                MinRequiredNumberOfNodes = NumberOfHosts,
+                NodeFailureTolerance = NumberOfHosts / 2,
+                PricePerSlotPerSecond = PricePerSlotPerSecondTSTWei.TstWei(),
+                ProofProbability = 20,
+                RequiredCollateral = 1.Tst()
+            });
+        }
+
+        private TimeSpan GetContractDuration()
+        {
+            var config = GetContracts().Deployment.Config;
+            return TimeSpan.FromSeconds(((double)config.Proofs.Period) * 2.0);
         }
 
         private ICodexNodeGroup StartHosts()
diff --git a/Tests/CodexReleaseTests/MarketTests/MarketplaceAutoBootstrapDistTest.cs b/Tests/CodexReleaseTests/MarketTests/MarketplaceAutoBootstrapDistTest.cs
index 045be2f..b7d9a51 100644
--- a/Tests/CodexReleaseTests/MarketTests/MarketplaceAutoBootstrapDistTest.cs
+++ b/Tests/CodexReleaseTests/MarketTests/MarketplaceAutoBootstrapDistTest.cs
@@ -1,8 +1,10 @@
 using CodexContractsPlugin;
+using CodexContractsPlugin.Marketplace;
 using CodexPlugin;
 using CodexTests;
 using DistTestCore;
 using GethPlugin;
+using Nethereum.Hex.HexConvertors.Extensions;
 
 namespace CodexReleaseTests.MarketTests
 {
@@ -41,6 +43,37 @@ namespace CodexReleaseTests.MarketTests
             return handles[Get()].Contracts;
         }
 
+        public SlotFill[] GetOnChainSlotFills(ICodexNodeGroup possibleHosts, string purchaseId)
+        {
+            return GetOnChainSlotFills(possibleHosts)
+                .Where(f => f.SlotFilledEvent.RequestId.ToHex(true) == purchaseId)
+                .ToArray();
+        }
+
+        public SlotFill[] GetOnChainSlotFills(ICodexNodeGroup possibleHosts)
+        {
+            var events = GetContracts().GetEvents(GetTestRunTimeRange());
+            var fills = events.GetSlotFilledEvents();
+            return fills.Select(f =>
+            {
+                var host = possibleHosts.Single(h => h.EthAddress == f.Host);
+                return new SlotFill(f, host);
+
+            }).ToArray();
+        }
+
+        public class SlotFill
+        {
+            public SlotFill(SlotFilledEventDTO slotFilledEvent, ICodexNode host)
+            {
+                SlotFilledEvent = slotFilledEvent;
+                Host = host;
+            }
+
+            public SlotFilledEventDTO SlotFilledEvent { get; }
+            public ICodexNode Host { get; }
+        }
+
         private class MarketplaceHandle
         {
             public MarketplaceHandle(IGethNode geth, ICodexContracts contracts)