diff --git a/src/BirdsiteLive.Pipeline/Contracts/IRetrieveTwitterAccountsProcessor.cs b/src/BirdsiteLive.Pipeline/Contracts/IRetrieveTwitterUsersProcessor.cs
similarity index 100%
rename from src/BirdsiteLive.Pipeline/Contracts/IRetrieveTwitterAccountsProcessor.cs
rename to src/BirdsiteLive.Pipeline/Contracts/IRetrieveTwitterUsersProcessor.cs
diff --git a/src/BirdsiteLive.Pipeline/Processors/RetrieveTweetsProcessor.cs b/src/BirdsiteLive.Pipeline/Processors/RetrieveTweetsProcessor.cs
index dc556ba..68ca0b0 100644
--- a/src/BirdsiteLive.Pipeline/Processors/RetrieveTweetsProcessor.cs
+++ b/src/BirdsiteLive.Pipeline/Processors/RetrieveTweetsProcessor.cs
@@ -44,7 +44,7 @@ namespace BirdsiteLive.Pipeline.Processors
                 }
                 else if (tweets.Length > 0 && user.LastTweetPostedId == -1)
                 {
-                    var tweetId = tweets.First().Id;
+                    var tweetId = tweets.Last().Id;
                     await _twitterUserDal.UpdateTwitterUserAsync(user.Id, tweetId, tweetId);
                 }
             }
diff --git a/src/BirdsiteLive.Pipeline/Processors/RetrieveTwitterAccountsProcessor.cs b/src/BirdsiteLive.Pipeline/Processors/RetrieveTwitterUsersProcessor.cs
similarity index 100%
rename from src/BirdsiteLive.Pipeline/Processors/RetrieveTwitterAccountsProcessor.cs
rename to src/BirdsiteLive.Pipeline/Processors/RetrieveTwitterUsersProcessor.cs
diff --git a/src/Tests/BirdsiteLive.Pipeline.Tests/Processors/RetrieveTweetsProcessorTests.cs b/src/Tests/BirdsiteLive.Pipeline.Tests/Processors/RetrieveTweetsProcessorTests.cs
new file mode 100644
index 0000000..ce29997
--- /dev/null
+++ b/src/Tests/BirdsiteLive.Pipeline.Tests/Processors/RetrieveTweetsProcessorTests.cs
@@ -0,0 +1,193 @@
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using BirdsiteLive.DAL.Contracts;
+using BirdsiteLive.DAL.Models;
+using BirdsiteLive.Pipeline.Processors;
+using BirdsiteLive.Twitter;
+using BirdsiteLive.Twitter.Models;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace BirdsiteLive.Pipeline.Tests.Processors
+{
+    [TestClass]
+    public class RetrieveTweetsProcessorTests
+    {
+        [TestMethod]
+        public async Task ProcessAsync_UserNotSync_Test()
+        {
+            #region Stubs
+            var user1 = new SyncTwitterUser
+            {
+                Id = 1,
+                Acct = "acct",
+                LastTweetPostedId = -1
+            };
+
+            var users = new[]
+            {
+                user1
+            };
+
+            var tweets = new[]
+            {
+                new ExtractedTweet
+                {
+                    Id = 47
+                }
+            };
+            #endregion
+
+            #region Mocks
+            var twitterServiceMock = new Mock<ITwitterService>(MockBehavior.Strict);
+            twitterServiceMock
+                .Setup(x => x.GetTimeline(
+                    It.Is<string>(y => y == user1.Acct),
+                    It.Is<int>(y => y == 1),
+                    It.Is<long>(y => y == -1)
+                ))
+                .Returns(tweets);
+
+            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
+            twitterUserDalMock
+                .Setup(x => x.UpdateTwitterUserAsync(
+                    It.Is<int>(y => y == user1.Id),
+                    It.Is<long>(y => y == tweets.Last().Id),
+                    It.Is<long>(y => y == tweets.Last().Id)
+                ))
+                .Returns(Task.CompletedTask);
+            #endregion
+
+            var processor = new RetrieveTweetsProcessor(twitterServiceMock.Object, twitterUserDalMock.Object);
+            var usersResult = await processor.ProcessAsync(users, CancellationToken.None);
+
+            #region Validations
+            twitterServiceMock.VerifyAll();
+            twitterUserDalMock.VerifyAll();
+
+            Assert.AreEqual(0, usersResult.Length);
+            #endregion
+        }
+
+        [TestMethod]
+        public async Task ProcessAsync_UserSync_Test()
+        {
+            #region Stubs
+            var user1 = new SyncTwitterUser
+            {
+                Id = 1,
+                Acct = "acct",
+                LastTweetPostedId = 46,
+                LastTweetSynchronizedForAllFollowersId = 46
+            };
+
+            var users = new[]
+            {
+                user1
+            };
+
+            var tweets = new[]
+            {
+                new ExtractedTweet
+                {
+                    Id = 47
+                },
+                new ExtractedTweet
+                {
+                    Id = 48
+                },
+                new ExtractedTweet
+                {
+                    Id = 49
+                }
+            };
+            #endregion
+
+            #region Mocks
+            var twitterServiceMock = new Mock<ITwitterService>(MockBehavior.Strict);
+            twitterServiceMock
+                .Setup(x => x.GetTimeline(
+                    It.Is<string>(y => y == user1.Acct),
+                    It.Is<int>(y => y == 200),
+                    It.Is<long>(y => y == user1.LastTweetSynchronizedForAllFollowersId)
+                ))
+                .Returns(tweets);
+
+            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
+            #endregion
+
+            var processor = new RetrieveTweetsProcessor(twitterServiceMock.Object, twitterUserDalMock.Object);
+            var usersResult = await processor.ProcessAsync(users, CancellationToken.None);
+
+            #region Validations
+            twitterServiceMock.VerifyAll();
+            twitterUserDalMock.VerifyAll();
+
+            Assert.AreEqual(users.Length, usersResult.Length);
+            Assert.AreEqual(users[0].Acct, usersResult[0].User.Acct);
+            Assert.AreEqual(tweets.Length, usersResult[0].Tweets.Length);
+            #endregion
+        }
+
+        [TestMethod]
+        public async Task ProcessAsync_UserPartiallySync_Test()
+        {
+            #region Stubs
+            var user1 = new SyncTwitterUser
+            {
+                Id = 1,
+                Acct = "acct",
+                LastTweetPostedId = 49,
+                LastTweetSynchronizedForAllFollowersId = 46
+            };
+
+            var users = new[]
+            {
+                user1
+            };
+
+            var tweets = new[]
+            {
+                new ExtractedTweet
+                {
+                    Id = 47
+                },
+                new ExtractedTweet
+                {
+                    Id = 48
+                },
+                new ExtractedTweet
+                {
+                    Id = 49
+                }
+            };
+            #endregion
+
+            #region Mocks
+            var twitterServiceMock = new Mock<ITwitterService>(MockBehavior.Strict);
+            twitterServiceMock
+                .Setup(x => x.GetTimeline(
+                    It.Is<string>(y => y == user1.Acct),
+                    It.Is<int>(y => y == 200),
+                    It.Is<long>(y => y == user1.LastTweetSynchronizedForAllFollowersId)
+                ))
+                .Returns(tweets);
+
+            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
+            #endregion
+
+            var processor = new RetrieveTweetsProcessor(twitterServiceMock.Object, twitterUserDalMock.Object);
+            var usersResult = await processor.ProcessAsync(users, CancellationToken.None);
+
+            #region Validations
+            twitterServiceMock.VerifyAll();
+            twitterUserDalMock.VerifyAll();
+
+            Assert.AreEqual(users.Length, usersResult.Length);
+            Assert.AreEqual(users[0].Acct, usersResult[0].User.Acct);
+            Assert.AreEqual(tweets.Length, usersResult[0].Tweets.Length);
+            #endregion
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Tests/BirdsiteLive.Pipeline.Tests/Processors/RetrieveTwitterUsersProcessorTests.cs b/src/Tests/BirdsiteLive.Pipeline.Tests/Processors/RetrieveTwitterUsersProcessorTests.cs
new file mode 100644
index 0000000..d3f8b08
--- /dev/null
+++ b/src/Tests/BirdsiteLive.Pipeline.Tests/Processors/RetrieveTwitterUsersProcessorTests.cs
@@ -0,0 +1,93 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Threading.Tasks.Dataflow;
+using BirdsiteLive.DAL.Contracts;
+using BirdsiteLive.DAL.Models;
+using BirdsiteLive.Pipeline.Processors;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace BirdsiteLive.Pipeline.Tests.Processors
+{
+    [TestClass]
+    public class RetrieveTwitterUsersProcessorTests
+    {
+        [TestMethod]
+        public async Task GetTwitterUsersAsync_Test()
+        {
+            #region Stubs
+            var buffer = new BufferBlock<SyncTwitterUser[]>();
+            var users = new[]
+            {
+                new SyncTwitterUser(),
+                new SyncTwitterUser(),
+                new SyncTwitterUser(),
+            };
+            #endregion
+
+            #region Mocks
+            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
+            twitterUserDalMock
+                .Setup(x => x.GetAllTwitterUsersAsync())
+                .ReturnsAsync(users);
+            #endregion
+
+            var processor = new RetrieveTwitterUsersProcessor(twitterUserDalMock.Object);
+            processor.GetTwitterUsersAsync(buffer, CancellationToken.None);
+
+            await Task.Delay(50);
+
+            #region Validations
+            twitterUserDalMock.VerifyAll();
+            Assert.AreEqual(1, buffer.Count);
+            buffer.TryReceive(out var result);
+            Assert.AreEqual(3, result.Length);
+            #endregion
+        }
+
+        [TestMethod]
+        public async Task GetTwitterUsersAsync_Exception_Test()
+        {
+            #region Stubs
+            var buffer = new BufferBlock<SyncTwitterUser[]>();
+            #endregion
+
+            #region Mocks
+            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
+            twitterUserDalMock
+                .Setup(x => x.GetAllTwitterUsersAsync())
+                .Throws(new Exception());
+            #endregion
+
+            var processor = new RetrieveTwitterUsersProcessor(twitterUserDalMock.Object);
+            var t = processor.GetTwitterUsersAsync(buffer, CancellationToken.None);
+
+            await Task.WhenAny(t, Task.Delay(50));
+
+            #region Validations
+            twitterUserDalMock.VerifyAll();
+            Assert.AreEqual(0, buffer.Count);
+            #endregion
+        }
+
+
+        [TestMethod]
+        [ExpectedException(typeof(OperationCanceledException))]
+        public async Task GetTwitterUsersAsync_Cancellation_Test()
+        {
+            #region Stubs
+            var buffer = new BufferBlock<SyncTwitterUser[]>();
+            var canTokenS = new CancellationTokenSource();
+            canTokenS.Cancel();
+            #endregion
+
+            #region Mocks
+            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
+            #endregion
+
+            var processor = new RetrieveTwitterUsersProcessor(twitterUserDalMock.Object);
+            await processor.GetTwitterUsersAsync(buffer, canTokenS.Token);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Tests/BirdsiteLive.Pipeline.Tests/Processors/SaveProgressionProcessorTests.cs b/src/Tests/BirdsiteLive.Pipeline.Tests/Processors/SaveProgressionProcessorTests.cs
new file mode 100644
index 0000000..d3880e6
--- /dev/null
+++ b/src/Tests/BirdsiteLive.Pipeline.Tests/Processors/SaveProgressionProcessorTests.cs
@@ -0,0 +1,210 @@
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using BirdsiteLive.DAL.Contracts;
+using BirdsiteLive.DAL.Models;
+using BirdsiteLive.Pipeline.Models;
+using BirdsiteLive.Pipeline.Processors;
+using BirdsiteLive.Twitter.Models;
+using Castle.DynamicProxy.Contributors;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace BirdsiteLive.Pipeline.Tests.Processors
+{
+    [TestClass]
+    public class SaveProgressionProcessorTests
+    {
+        [TestMethod]
+        public async Task ProcessAsync_Test()
+        {
+            #region Stubs
+            var user = new SyncTwitterUser
+            {
+                Id = 1
+            };
+            var tweet1 = new ExtractedTweet
+            {
+                Id = 36
+            };
+            var tweet2 = new ExtractedTweet
+            {
+                Id = 37
+            };
+            var follower1 = new Follower
+            {
+                FollowingsSyncStatus = new Dictionary<int, long>
+                {
+                    {1, 37}
+                }
+            };
+
+            var usersWithTweets = new UserWithTweetsToSync
+            {
+                Tweets = new []
+                {
+                    tweet1,
+                    tweet2
+                },
+                Followers = new []
+                {
+                    follower1
+                },
+                User = user
+            };
+            #endregion
+
+            #region Mocks
+            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
+            twitterUserDalMock
+                .Setup(x => x.UpdateTwitterUserAsync(
+                    It.Is<int>(y => y == user.Id),
+                    It.Is<long>(y => y == tweet2.Id),
+                    It.Is<long>(y => y == tweet2.Id)
+                ))
+                .Returns(Task.CompletedTask);
+            #endregion
+
+            var processor = new SaveProgressionProcessor(twitterUserDalMock.Object);
+            await processor.ProcessAsync(usersWithTweets, CancellationToken.None);
+
+            #region Validations
+            twitterUserDalMock.VerifyAll();
+            #endregion
+        }
+
+        [TestMethod]
+        public async Task ProcessAsync_PartiallySynchronized_Test()
+        {
+            #region Stubs
+            var user = new SyncTwitterUser
+            {
+                Id = 1
+            };
+            var tweet1 = new ExtractedTweet
+            {
+                Id = 36
+            };
+            var tweet2 = new ExtractedTweet
+            {
+                Id = 37
+            };
+            var tweet3 = new ExtractedTweet
+            {
+                Id = 38
+            };
+            var follower1 = new Follower
+            {
+                FollowingsSyncStatus = new Dictionary<int, long>
+                {
+                    {1, 37}
+                }
+            };
+
+            var usersWithTweets = new UserWithTweetsToSync
+            {
+                Tweets = new[]
+                {
+                    tweet1,
+                    tweet2,
+                    tweet3
+                },
+                Followers = new[]
+                {
+                    follower1
+                },
+                User = user
+            };
+            #endregion
+
+            #region Mocks
+            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
+            twitterUserDalMock
+                .Setup(x => x.UpdateTwitterUserAsync(
+                    It.Is<int>(y => y == user.Id),
+                    It.Is<long>(y => y == tweet3.Id),
+                    It.Is<long>(y => y == tweet2.Id)
+                ))
+                .Returns(Task.CompletedTask);
+            #endregion
+
+            var processor = new SaveProgressionProcessor(twitterUserDalMock.Object);
+            await processor.ProcessAsync(usersWithTweets, CancellationToken.None);
+
+            #region Validations
+            twitterUserDalMock.VerifyAll();
+            #endregion
+        }
+
+        [TestMethod]
+        public async Task ProcessAsync_PartiallySynchronized_MultiUsers_Test()
+        {
+            #region Stubs
+            var user = new SyncTwitterUser
+            {
+                Id = 1
+            };
+            var tweet1 = new ExtractedTweet
+            {
+                Id = 36
+            };
+            var tweet2 = new ExtractedTweet
+            {
+                Id = 37
+            };
+            var tweet3 = new ExtractedTweet
+            {
+                Id = 38
+            };
+            var follower1 = new Follower
+            {
+                FollowingsSyncStatus = new Dictionary<int, long>
+                {
+                    {1, 37}
+                }
+            };
+            var follower2 = new Follower
+            {
+                FollowingsSyncStatus = new Dictionary<int, long>
+                {
+                    {1, 38}
+                }
+            };
+
+            var usersWithTweets = new UserWithTweetsToSync
+            {
+                Tweets = new[]
+                {
+                    tweet1,
+                    tweet2,
+                    tweet3
+                },
+                Followers = new[]
+                {
+                    follower1,
+                    follower2
+                },
+                User = user
+            };
+            #endregion
+
+            #region Mocks
+            var twitterUserDalMock = new Mock<ITwitterUserDal>(MockBehavior.Strict);
+            twitterUserDalMock
+                .Setup(x => x.UpdateTwitterUserAsync(
+                    It.Is<int>(y => y == user.Id),
+                    It.Is<long>(y => y == tweet3.Id),
+                    It.Is<long>(y => y == tweet2.Id)
+                ))
+                .Returns(Task.CompletedTask);
+            #endregion
+
+            var processor = new SaveProgressionProcessor(twitterUserDalMock.Object);
+            await processor.ProcessAsync(usersWithTweets, CancellationToken.None);
+
+            #region Validations
+            twitterUserDalMock.VerifyAll();
+            #endregion
+        }
+    }
+}
\ No newline at end of file