diff --git a/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp11/Lightup/IImportScopeWrapperCSharp11UnitTests.cs b/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp11/Lightup/IImportScopeWrapperCSharp11UnitTests.cs
index 1980e143e..2043f5cba 100644
--- a/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp11/Lightup/IImportScopeWrapperCSharp11UnitTests.cs
+++ b/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp11/Lightup/IImportScopeWrapperCSharp11UnitTests.cs
@@ -3,33 +3,39 @@
 
 namespace StyleCop.Analyzers.Test.CSharp11.Lightup
 {
-    using System;
+    using System.Collections.Generic;
     using System.Collections.Immutable;
     using Microsoft.CodeAnalysis;
+    using Moq;
     using StyleCop.Analyzers.Lightup;
     using StyleCop.Analyzers.Test.CSharp10.Lightup;
     using Xunit;
 
     public partial class IImportScopeWrapperCSharp11UnitTests : IImportScopeWrapperCSharp10UnitTests
     {
-        [Fact]
-        public void TestCompatibleInstance()
+        [Theory]
+        [InlineData(0)]
+        [InlineData(1)]
+        [InlineData(2)]
+        public void TestCompatibleInstance(int numberOfAliasSymbols)
         {
-            var obj = new TestImportScope();
+            var obj = CreateImportScope(numberOfAliasSymbols);
             Assert.True(IImportScopeWrapper.IsInstance(obj));
             var wrapper = IImportScopeWrapper.FromObject(obj);
-            Assert.Empty(wrapper.Aliases);
+            Assert.Equal(obj.Aliases, wrapper.Aliases);
         }
 
-        private class TestImportScope : IImportScope
+        private static IImportScope CreateImportScope(int numberOfAliasSymbols)
         {
-            public ImmutableArray<IAliasSymbol> Aliases => ImmutableArray<IAliasSymbol>.Empty;
+            var aliasSymbolMocks = new List<IAliasSymbol>();
+            for (var i = 0; i < numberOfAliasSymbols; i++)
+            {
+                aliasSymbolMocks.Add(Mock.Of<IAliasSymbol>());
+            }
 
-            public ImmutableArray<IAliasSymbol> ExternAliases => throw new NotImplementedException();
-
-            public ImmutableArray<ImportedNamespaceOrType> Imports => throw new NotImplementedException();
-
-            public ImmutableArray<ImportedXmlNamespace> XmlNamespaces => throw new NotImplementedException();
+            var importScopeMock = new Mock<IImportScope>();
+            importScopeMock.Setup(x => x.Aliases).Returns(aliasSymbolMocks.ToImmutableArray());
+            return importScopeMock.Object;
         }
     }
 }
diff --git a/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp11/StyleCop.Analyzers.Test.CSharp11.csproj b/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp11/StyleCop.Analyzers.Test.CSharp11.csproj
index 3ce4f0d1c..1172669bb 100644
--- a/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp11/StyleCop.Analyzers.Test.CSharp11.csproj
+++ b/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp11/StyleCop.Analyzers.Test.CSharp11.csproj
@@ -19,6 +19,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.4.0" />
+    <PackageReference Include="Moq" Version="4.20.70" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" PrivateAssets="all" />
   </ItemGroup>