diff --git a/src/csharp/Tests/FunctionalTests/Microsoft.Azure.Kinect.Sensor.FunctionalTests.csproj b/src/csharp/Tests/FunctionalTests/Microsoft.Azure.Kinect.Sensor.FunctionalTests.csproj
index c6995dca8..f199235da 100644
--- a/src/csharp/Tests/FunctionalTests/Microsoft.Azure.Kinect.Sensor.FunctionalTests.csproj
+++ b/src/csharp/Tests/FunctionalTests/Microsoft.Azure.Kinect.Sensor.FunctionalTests.csproj
@@ -2,7 +2,7 @@
   <Import Project="..\..\k4a.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>
 
diff --git a/src/csharp/Tests/StubGenerator.UnitTests/Microsoft.Azure.Kinect.Sensor.Test.StubGenerator.UnitTests.csproj b/src/csharp/Tests/StubGenerator.UnitTests/Microsoft.Azure.Kinect.Sensor.Test.StubGenerator.UnitTests.csproj
index 2a3cf43ae..2b20a4dce 100644
--- a/src/csharp/Tests/StubGenerator.UnitTests/Microsoft.Azure.Kinect.Sensor.Test.StubGenerator.UnitTests.csproj
+++ b/src/csharp/Tests/StubGenerator.UnitTests/Microsoft.Azure.Kinect.Sensor.Test.StubGenerator.UnitTests.csproj
@@ -2,7 +2,7 @@
   <Import Project="..\..\k4a.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>
 
diff --git a/src/csharp/Tests/UnitTests/Microsoft.Azure.Kinect.Sensor.UnitTests.csproj b/src/csharp/Tests/UnitTests/Microsoft.Azure.Kinect.Sensor.UnitTests.csproj
index 438ca44ef..a94d7ac2d 100644
--- a/src/csharp/Tests/UnitTests/Microsoft.Azure.Kinect.Sensor.UnitTests.csproj
+++ b/src/csharp/Tests/UnitTests/Microsoft.Azure.Kinect.Sensor.UnitTests.csproj
@@ -2,7 +2,7 @@
   <Import Project="..\..\k4a.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>