diff --git a/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj b/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
index 962c116..5a188b7 100644
--- a/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
+++ b/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
@@ -53,10 +53,10 @@
       <HintPath>..\..\packages\nanoFramework.System.Text.2.0.0-preview.23\lib\netnano1.0\nanoFramework.System.Text.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.TestFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.63\lib\netnano1.0\nanoFramework.TestFramework.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.64\lib\netnano1.0\nanoFramework.TestFramework.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.UnitTestLauncher, Version=0.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.63\lib\netnano1.0\nanoFramework.UnitTestLauncher.exe</HintPath>
+      <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.64\lib\netnano1.0\nanoFramework.UnitTestLauncher.exe</HintPath>
     </Reference>
     <Reference Include="System.IO.Streams, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\..\packages\nanoFramework.System.IO.Streams.2.0.0-preview.22\lib\netnano1.0\System.IO.Streams.dll</HintPath>
diff --git a/Tests/UnitTestsSerialPort/packages.config b/Tests/UnitTestsSerialPort/packages.config
index 2afa4ef..db4c9c0 100644
--- a/Tests/UnitTestsSerialPort/packages.config
+++ b/Tests/UnitTestsSerialPort/packages.config
@@ -5,5 +5,5 @@
   <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.13" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.22" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.23" targetFramework="netnano1.0" />
-  <package id="nanoFramework.TestFramework" version="4.0.0-preview.63" targetFramework="netnano1.0" developmentDependency="true" />
+  <package id="nanoFramework.TestFramework" version="4.0.0-preview.64" targetFramework="netnano1.0" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/Tests/UnitTestsSerialPort/packages.lock.json b/Tests/UnitTestsSerialPort/packages.lock.json
index 1260f3e..e6b7022 100644
--- a/Tests/UnitTestsSerialPort/packages.lock.json
+++ b/Tests/UnitTestsSerialPort/packages.lock.json
@@ -34,9 +34,9 @@
       },
       "nanoFramework.TestFramework": {
         "type": "Direct",
-        "requested": "[4.0.0-preview.63, 4.0.0-preview.63]",
-        "resolved": "4.0.0-preview.63",
-        "contentHash": "PAcmQOkWsDNXj1BZwa08WirjA+WXNtsCMnaRrFaeaJM4kYRygfAsHu6Jj9G5oo58IXjmACL1IdO6agRlSEZMew=="
+        "requested": "[4.0.0-preview.64, 4.0.0-preview.64]",
+        "resolved": "4.0.0-preview.64",
+        "contentHash": "cySRwBDPdjowdBd3QStySByGdWTTpBwdWOM/wXRErgbUNSrI9Sfqv4m0y9o966f5zLR8YAyh7K79GbF20YQkrw=="
       }
     }
   }