diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Constants.cs b/src/Microsoft.TestPlatform.CrossPlatEngine/Constants.cs
new file mode 100644
index 0000000000..44754c2535
--- /dev/null
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Constants.cs
@@ -0,0 +1,29 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.VisualStudio.TestPlatform.CrossPlatEngine
+{
+    using Microsoft.VisualStudio.TestPlatform.PlatformAbstractions;
+    using System.Collections.Generic;
+    using System.Collections.ObjectModel;
+    using System.IO;
+
+    /// <summary>
+    /// The set of constants used throughout this project.
+    /// </summary>
+    public class Constants
+    {
+        // Replace this collection with list of adapters we want to whitelist from "Extensions" folder in Next Major VS Release
+        internal static readonly IList<string> DefaultAdapters = new ReadOnlyCollection<string>(new List<string>
+        {
+            "executor://CodedWebTestAdapter/v1",
+            "executor://GenericTestAdapter/v1",
+            "executor://OrderedTestAdapter/v1",
+            "executor://MSTestAdapter/v1",
+            "executor://WebTestAdapter/v1",
+            "executor://CppUnitTestExecutor/v1"
+        });
+
+        internal static string DefaultAdapterLocation = Path.Combine(new ProcessHelper().GetCurrentProcessLocation(), "Extensions");
+    }
+}
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Discovery/DiscovererEnumerator.cs b/src/Microsoft.TestPlatform.CrossPlatEngine/Discovery/DiscovererEnumerator.cs
index 293b710050..b692e2c311 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Discovery/DiscovererEnumerator.cs
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Discovery/DiscovererEnumerator.cs
@@ -9,6 +9,7 @@ namespace Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Discovery
     using System.Globalization;
     using System.IO;
     using System.Linq;
+    using System.Reflection;
 
     using Microsoft.VisualStudio.TestPlatform.Common.ExtensionFramework;
     using Microsoft.VisualStudio.TestPlatform.Common.ExtensionFramework.Utilities;
@@ -23,6 +24,7 @@ namespace Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Discovery
     using Microsoft.VisualStudio.TestPlatform.ObjectModel.Adapter;
     using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;
     using Microsoft.VisualStudio.TestPlatform.ObjectModel.Logging;
+    using Microsoft.VisualStudio.TestPlatform.PlatformAbstractions;
 
     using CrossPlatEngineResources = Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Resources.Resources;
 
@@ -105,6 +107,8 @@ private void LoadTestsFromAnExtension(string extensionAssembly, IEnumerable<stri
             // Stopwatch to collect metrics
             var timeStart = DateTime.UtcNow;
 
+            var discoverersFromDeprecatedLocations = false;
+
             var discovererToSourcesMap = GetDiscovererToSourcesMap(extensionAssembly, sources, logger, this.assemblyProperties);
             var totalAdapterLoadTIme = DateTime.UtcNow - timeStart;
 
@@ -175,6 +179,12 @@ private void LoadTestsFromAnExtension(string extensionAssembly, IEnumerable<stri
                     {
                         var totalDiscoveredTests = this.discoveryResultCache.TotalDiscoveredTests - currentTotalTests;
                         this.requestData.MetricsCollection.Add(string.Format("{0}.{1}", TelemetryDataConstants.TotalTestsByAdapter, discoverer.Metadata.DefaultExecutorUri), totalDiscoveredTests);
+                        if (!CrossPlatEngine.Constants.DefaultAdapters.Contains(discoverer.Metadata.DefaultExecutorUri.ToString(), StringComparer.OrdinalIgnoreCase))
+                        {
+                            var discovererLocation = discoverer.Value.GetType().GetTypeInfo().Assembly.GetAssemblyLocation();
+
+                            discoverersFromDeprecatedLocations |= Path.GetDirectoryName(discovererLocation).Equals(CrossPlatEngine.Constants.DefaultAdapterLocation, StringComparison.OrdinalIgnoreCase);
+                        }
                         totalAdaptersUsed++;
                     }
 
@@ -185,6 +195,11 @@ private void LoadTestsFromAnExtension(string extensionAssembly, IEnumerable<stri
                             discoverer.Value.GetType().FullName);
                     }
 
+                    if (discoverersFromDeprecatedLocations)
+                    {
+                        logger.SendMessage(TestMessageLevel.Warning, string.Format(CultureInfo.CurrentCulture, CrossPlatEngineResources.DeprecatedAdapterPath));
+                    }
+
                     // Collecting Data Point for Time Taken to Discover Tests by each Adapter
                     this.requestData.MetricsCollection.Add(string.Format("{0}.{1}", TelemetryDataConstants.TimeTakenToDiscoverTestsByAnAdapter, discoverer.Metadata.DefaultExecutorUri), totalAdapterRunTime.TotalSeconds);
                     totalTimeTakenByAdapters += totalAdapterRunTime.TotalSeconds;
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Execution/BaseRunTests.cs b/src/Microsoft.TestPlatform.CrossPlatEngine/Execution/BaseRunTests.cs
index 8361a80d67..ad5bef97b9 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Execution/BaseRunTests.cs
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Execution/BaseRunTests.cs
@@ -9,7 +9,9 @@ namespace Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Execution
     using System.Diagnostics;
     using System.Diagnostics.CodeAnalysis;
     using System.Globalization;
+    using System.IO;
     using System.Linq;
+    using System.Reflection;
     using System.Threading.Tasks;
 
     using Microsoft.VisualStudio.TestPlatform.Common.ExtensionFramework;
@@ -360,6 +362,8 @@ private bool RunTestInternalWithExecutors(IEnumerable<Tuple<Uri, string>> execut
         {
             double totalTimeTakenByAdapters = 0;
 
+            var executorsFromDeprecatedLocations = false;
+
             // Call the executor for each group of tests.
             var exceptionsHitDuringRunTests = false;
 
@@ -417,6 +421,13 @@ private bool RunTestInternalWithExecutors(IEnumerable<Tuple<Uri, string>> execut
                             var totalTestRun = this.testRunCache.TotalExecutedTests - totalTests;
                             this.requestData.MetricsCollection.Add(string.Format("{0}.{1}", TelemetryDataConstants.TotalTestsRanByAdapter, executorUriExtensionTuple.Item1.AbsoluteUri), totalTestRun);
 
+                            if (!CrossPlatEngine.Constants.DefaultAdapters.Contains(executor.Metadata.ExtensionUri, StringComparer.OrdinalIgnoreCase))
+                            {
+                                var executorLocation = executor.Value.GetType().GetTypeInfo().Assembly.GetAssemblyLocation();
+
+                                executorsFromDeprecatedLocations |= Path.GetDirectoryName(executorLocation).Equals(CrossPlatEngine.Constants.DefaultAdapterLocation);
+                            }
+
                             totalTests = this.testRunCache.TotalExecutedTests;
                         }
 
@@ -471,6 +482,11 @@ private bool RunTestInternalWithExecutors(IEnumerable<Tuple<Uri, string>> execut
             // Collecting Total Time Taken by Adapters
             this.requestData.MetricsCollection.Add(TelemetryDataConstants.TimeTakenByAllAdaptersInSec, totalTimeTakenByAdapters);
 
+            if (executorsFromDeprecatedLocations)
+            {
+                this.TestRunEventsHandler?.HandleLogMessage(TestMessageLevel.Warning, string.Format(CultureInfo.CurrentCulture, CrossPlatEngineResources.DeprecatedAdapterPath));
+            }
+
             return exceptionsHitDuringRunTests;
         }
 
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/Resources.Designer.cs b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/Resources.Designer.cs
index 7d5dfd61f6..750d15f4c1 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/Resources.Designer.cs
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/Resources.Designer.cs
@@ -78,7 +78,18 @@ internal static string DataCollectorDebuggerWarning {
                 return ResourceManager.GetString("DataCollectorDebuggerWarning", resourceCulture);
             }
         }
-        
+
+        /// <summary>
+        ///   Looks up a localized string similar to Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details..
+        /// </summary>
+        internal static string DeprecatedAdapterPath
+        {
+            get
+            {
+                return ResourceManager.GetString("DeprecatedAdapterPath", resourceCulture);
+            }
+        }
+
         /// <summary>
         ///   Looks up a localized string similar to Exception occurred while instantiating discoverer : {0}.
         /// </summary>
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/Resources.resx b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/Resources.resx
index 7750aca1de..63da8ebe38 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/Resources.resx
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/Resources.resx
@@ -192,4 +192,7 @@
   <data name="NonExistingExtensions" xml:space="preserve">
     <value>Could not find extensions: {0}</value>
   </data>
+  <data name="DeprecatedAdapterPath" xml:space="preserve">
+    <value>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.cs.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.cs.xlf
index 99a13497ae..873ac767a1 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.cs.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.cs.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.de.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.de.xlf
index 3d6e6842cf..414d24c825 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.de.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.de.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.es.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.es.xlf
index d919fb5ea0..4c81b507b1 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.es.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.es.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.fr.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.fr.xlf
index f87910b381..19055d1ed3 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.fr.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.fr.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.it.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.it.xlf
index c5e773a89b..2ad3c9317a 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.it.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.it.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ja.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ja.xlf
index fe57526e0c..cd1482b877 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ja.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ja.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ko.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ko.xlf
index 600b80b01b..fbb2d0c109 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ko.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ko.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.pl.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.pl.xlf
index c56c5ff7bd..d1cf68fcce 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.pl.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.pl.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.pt-BR.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.pt-BR.xlf
index 63de9e932a..991c8fe7d3 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.pt-BR.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.pt-BR.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ru.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ru.xlf
index 979236cf83..0e62b3ca86 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ru.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.ru.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.tr.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.tr.xlf
index 19dc656880..21baeac44e 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.tr.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.tr.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.xlf
index e2b8a42c56..8046023a69 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.xlf
@@ -107,6 +107,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.zh-Hans.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.zh-Hans.xlf
index 6fdce0780e..55976b63e5 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.zh-Hans.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.zh-Hans.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.zh-Hant.xlf b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.zh-Hant.xlf
index 0605f3d04e..3f6d814ea7 100644
--- a/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.zh-Hant.xlf
+++ b/src/Microsoft.TestPlatform.CrossPlatEngine/Resources/xlf/Resources.zh-Hant.xlf
@@ -196,6 +196,11 @@
         <target state="new">Could not find extensions: {0}</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="DeprecatedAdapterPath">
+        <source>Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</source>
+        <target state="new">Adapter lookup is being changed, please follow https://github.com/Microsoft/vstest-docs/blob/master/RFCs/0022-User-Specified-TestAdapter-Lookup.md#roadmap for more details.</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/test/Microsoft.TestPlatform.AcceptanceTests/DeprecateExtensionsPathWarningTests.cs b/test/Microsoft.TestPlatform.AcceptanceTests/DeprecateExtensionsPathWarningTests.cs
new file mode 100644
index 0000000000..7416e93547
--- /dev/null
+++ b/test/Microsoft.TestPlatform.AcceptanceTests/DeprecateExtensionsPathWarningTests.cs
@@ -0,0 +1,86 @@
+namespace Microsoft.TestPlatform.AcceptanceTests
+{
+    using Microsoft.VisualStudio.TestPlatform.PlatformAbstractions;
+    using Microsoft.VisualStudio.TestTools.UnitTesting;
+    using System.Collections.Generic;
+    using System.IO;
+    using System.Reflection;
+
+    [TestClass]
+    public class DeprecateExtensionsPathWarningTests : AcceptanceTestBase
+    {
+        private IList<string> adapterDependencies;
+        private IList<string> copiedFiles;
+
+        private string BuildConfiguration
+        {
+            get
+            {
+#if DEBUG
+                return "Debug";
+#else
+                return "Release";
+#endif
+            }
+        }
+
+        [TestCleanup]
+        public void Cleanup()
+        {
+            try
+            {
+                foreach (var file in this.copiedFiles)
+                {
+                    File.Delete(file);
+                }
+            }
+            catch
+            {
+
+            }
+        }
+
+        [TestInitialize]
+        public void CopyAdapterToExtensions()
+        {
+            this.copiedFiles = new List<string>();
+            var extensionsDir = Path.Combine(Path.GetDirectoryName(this.GetConsoleRunnerPath()), "Extensions");
+            this.adapterDependencies = Directory.GetFiles(this.GetTestAdapterPath(), "*.dll", SearchOption.TopDirectoryOnly);
+
+            try
+            {
+                foreach (var file in this.adapterDependencies)
+                {
+                    var fileCopied = Path.Combine(extensionsDir, Path.GetFileName(file));
+                    this.copiedFiles.Add(fileCopied);
+                    File.Copy(file, fileCopied);
+                }
+            }
+            catch
+            {
+
+            }
+        }
+
+        [TestMethod]
+        public void VerifyDeprecatedWarningIsThrownWhenAdaptersPickedFromExtensionDirectory()
+        {
+            var arguments = PrepareArguments(
+                this.GetSampleTestAssembly(),
+                null,
+                null,
+                this.FrameworkArgValue);
+
+            this.InvokeVsTest(arguments);
+
+            this.StdOutputContains("Adapter lookup is being changed, please follow");
+        }
+
+        public override string GetConsoleRunnerPath()
+        {
+            DirectoryInfo currentDirectory = new DirectoryInfo(typeof(DeprecateExtensionsPathWarningTests).GetTypeInfo().Assembly.GetAssemblyLocation()).Parent.Parent.Parent.Parent.Parent.Parent;
+
+            return Path.Combine(currentDirectory.FullName, "artifacts", BuildConfiguration, "net451", "win7-x64", "vstest.console.exe");
+        }
+    }
+}
\ No newline at end of file