diff --git a/src/libraries/System.Reflection.DispatchProxy/src/System/Reflection/DispatchProxyGenerator.cs b/src/libraries/System.Reflection.DispatchProxy/src/System/Reflection/DispatchProxyGenerator.cs
index ac765e8be34ffd..4639eff6248848 100644
--- a/src/libraries/System.Reflection.DispatchProxy/src/System/Reflection/DispatchProxyGenerator.cs
+++ b/src/libraries/System.Reflection.DispatchProxy/src/System/Reflection/DispatchProxyGenerator.cs
@@ -246,6 +246,17 @@ internal void EnsureTypeIsVisible(Type type)
                         GenerateInstanceOfIgnoresAccessChecksToAttribute(assemblyName);
                     }
                 }
+
+                if (type.IsGenericType)
+                {
+                    foreach (Type genericArg in type.GetGenericArguments())
+                    {
+                        if (!genericArg.IsGenericParameter)
+                        {
+                            EnsureTypeIsVisible(genericArg);
+                        }
+                    }
+                }
             }
         }
 
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index c3a6d07d77d383..bff3061df6e50c 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -188,7 +188,6 @@
     <!-- test failures -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Formats.Nrbf\tests\System.Formats.Nrbf.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Linq.Expressions\tests\System.Linq.Expressions.Tests.csproj" />
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Reflection.DispatchProxy\tests\System.Reflection.DispatchProxy.Tests.csproj" />
     <!-- long running suites -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Linq\tests\System.Linq.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Memory\tests\System.Memory.Tests.csproj" />