diff --git a/src/Features/Lsif/GeneratorTest/RangeResultSetTests.vb b/src/Features/Lsif/GeneratorTest/RangeResultSetTests.vb
index b327ac25f6eb32797e3316f39412867de5c68244..ca7ba6bbd1eb9ad6793ad5bbe47da7ea0af53069 100644
--- a/src/Features/Lsif/GeneratorTest/RangeResultSetTests.vb
+++ b/src/Features/Lsif/GeneratorTest/RangeResultSetTests.vb
@@ -13,9 +13,9 @@ Namespace Microsoft.CodeAnalysis.LanguageServerIndexFormat.Generator.UnitTests
 
         <Theory>
         <InlineData("class C { [|string|] s; }", "mscorlib#T:System.String", WellKnownSymbolMonikerSchemes.DotnetXmlDoc)>
-        <InlineData("class C { void M() { [|M|](); }", TestProjectAssemblyName + "#M:C.M", WellKnownSymbolMonikerSchemes.DotnetXmlDoc)>
-        <InlineData("class C { void M(string s) { M([|s|]) }", TestProjectAssemblyName + "#M:C.M(System.String)#s", WellKnownSymbolMonikerSchemes.DotnetXmlDoc)>
-        <InlineData("class C { void M(string s) { string local; M([|local|]) }", Nothing, Nothing)>
+        <InlineData("class C { void M() { [|M|](); } }", TestProjectAssemblyName + "#M:C.M", WellKnownSymbolMonikerSchemes.DotnetXmlDoc)>
+        <InlineData("class C { void M(string s) { M([|s|]); } }", TestProjectAssemblyName + "#M:C.M(System.String)#s", WellKnownSymbolMonikerSchemes.DotnetXmlDoc)>
+        <InlineData("class C { void M(string s) { string local = """"; M([|local|]); } }", Nothing, Nothing)>
         <InlineData("class C { void M(string s) { M(s [|+|] s) }", Nothing, Nothing)>
         <InlineData("using [|S|] = System.String;", Nothing, Nothing)>
         <InlineData("class C { [|global|]::System.String s; }", "<global namespace>", WellKnownSymbolMonikerSchemes.DotnetNamespace)>
@@ -49,7 +49,9 @@ Namespace Microsoft.CodeAnalysis.LanguageServerIndexFormat.Generator.UnitTests
                             <Document Name="A.cs" FilePath="Z:\A.cs">
                                 <%= code %>
                             </Document>
+                            <ProjectReference Alias="A">ReferencedWithAlias</ProjectReference>
                         </Project>
+                        <Project AssemblyName="ReferencedWithAlias" Language="C#" FilePath="Z:\ReferencedWithAlias.csproj"></Project>
                     </Workspace>))
 
             Assert.Empty(lsif.Vertices.OfType(Of Range))
diff --git a/src/Features/Lsif/GeneratorTest/Utilities/TestLsifOutput.vb b/src/Features/Lsif/GeneratorTest/Utilities/TestLsifOutput.vb
index 3ffa078261671277c8069c108c8084ee5a696681..89c2ec013f09bbf60604acb2ade1483a7bcc3688 100644
--- a/src/Features/Lsif/GeneratorTest/Utilities/TestLsifOutput.vb
+++ b/src/Features/Lsif/GeneratorTest/Utilities/TestLsifOutput.vb
@@ -30,6 +30,10 @@ Namespace Microsoft.CodeAnalysis.LanguageServerIndexFormat.Generator.UnitTests.U
 
             For Each project In workspace.CurrentSolution.Projects
                 Dim compilation = Await project.GetCompilationAsync()
+
+                ' Assert we don't have any errors to prevent any typos in the tests
+                Assert.Empty(compilation.GetDiagnostics().Where(Function(d) d.Severity = DiagnosticSeverity.Error))
+
                 generator.GenerateForCompilation(compilation, project.FilePath, project.LanguageServices)
             Next
         End Function