diff --git a/src/EditorFeatures/Test2/GoToBase/CSharpGoToBaseTests.vb b/src/EditorFeatures/Test2/GoToBase/CSharpGoToBaseTests.vb
index 4d88f61a0b8eac5ebee17453542b577224eec8a2..8c8c52a7c910250cb4ebb0572c0b3d1c9a9a675c 100644
--- a/src/EditorFeatures/Test2/GoToBase/CSharpGoToBaseTests.vb
+++ b/src/EditorFeatures/Test2/GoToBase/CSharpGoToBaseTests.vb
@@ -18,7 +18,7 @@ Namespace Microsoft.CodeAnalysis.Editor.UnitTests.GoToBase
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
         Public Async Function TestWithSingleClass() As Task
-            Await TestAsync("class $$C { }")
+            Await TestAsync("class $$C { }", , metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -30,7 +30,7 @@ Namespace Microsoft.CodeAnalysis.Editor.UnitTests.GoToBase
 
 class $$D : C
 {
-}")
+}", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -38,7 +38,7 @@ class $$D : C
             Await TestAsync(
 "interface [|I|] { }
 abstract class [|C|] : I { }
-class $$D : C { }")
+class $$D : C { }", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -47,7 +47,7 @@ class $$D : C { }")
 "class [|D|] { }
 sealed class $$C : D
 {
-}")
+}", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -67,14 +67,14 @@ sealed class $$C : D
 
 class $$D : C
 {
-}")
+}", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
         Public Async Function TestWithSingleClassImplementation() As Task
             Await TestAsync(
 "class $$C : I { }
-interface [|I|] { }")
+interface [|I|] { }", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -82,7 +82,7 @@ interface [|I|] { }")
             Await TestAsync(
 "class $$C : I { }
 class D : I { }
-interface [|I|] { }")
+interface [|I|] { }", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -97,7 +97,7 @@ interface [|I2|] : I { }
 interface I1 : I { }
 interface [|I|] : J1, J2 { }
 interface [|J1|] { }
-interface [|J2|] { }")
+interface [|J2|] { }", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
 #End Region
@@ -109,14 +109,14 @@ interface [|J2|] { }")
             Await TestAsync(
 "struct $$C
 {
-}")
+}", metadataDefinitions:={"mscorlib:Object", "mscorlib:ValueType"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
         Public Async Function TestWithSingleStructImplementation() As Task
             Await TestAsync(
 "struct $$C : I { }
-interface [|I|] { }")
+interface [|I|] { }", metadataDefinitions:={"mscorlib:Object", "mscorlib:ValueType"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -127,7 +127,7 @@ interface [|I2|] : I { }
 interface I1 : I { }
 interface [|I|] : J1, J2 { }
 interface [|J1|] { }
-interface [|J2|] { }")
+interface [|J2|] { }", metadataDefinitions:={"mscorlib:Object", "mscorlib:ValueType"})
         End Function
 
 #End Region
diff --git a/src/EditorFeatures/Test2/GoToBase/VisuaBasicGoToBaseTests.vb b/src/EditorFeatures/Test2/GoToBase/VisuaBasicGoToBaseTests.vb
index b3d4514f00c126b109c05c747c6a6a98eec77f65..ff0d8d61b72f5529b0bedc7ca4ef37a3d6ad7d08 100644
--- a/src/EditorFeatures/Test2/GoToBase/VisuaBasicGoToBaseTests.vb
+++ b/src/EditorFeatures/Test2/GoToBase/VisuaBasicGoToBaseTests.vb
@@ -20,7 +20,7 @@ Namespace Microsoft.CodeAnalysis.Editor.UnitTests.GoToBase
         Public Async Function TestWithSingleClass() As Task
             Await TestAsync(
 "class $$C
-end class")
+end class", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -31,7 +31,7 @@ end class
 
 class $$D 
     inherits C
-end class")
+end class", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -44,7 +44,7 @@ mustinherit class [|C|]
 end class
 class $$D 
     inherits C
-end class")
+end class", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -54,7 +54,7 @@ end class")
 end class
 NotInheritable class $$C 
     inherits D
-end class")
+end class", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -72,7 +72,7 @@ end class
 
 class $$D 
     inherits C
-end class")
+end class", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -82,7 +82,7 @@ end class")
     implements I
 end class
 interface [|I|]
-end interface")
+end interface", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -95,7 +95,7 @@ class D
     implements I
 end class
 interface [|I|]
-end interface")
+end interface", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -128,7 +128,7 @@ end interface
 interface [|J1|]
 end interface
 interface [|J2|]
-end interface")
+end interface", metadataDefinitions:={"mscorlib:Object"})
         End Function
 
 #End Region
@@ -139,7 +139,7 @@ end interface")
         Public Async Function TestWithStruct() As Task
             Await TestAsync(
 "structure $$S
-end structure")
+end structure", metadataDefinitions:={"mscorlib:Object", "mscorlib:ValueType"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -149,7 +149,7 @@ end structure")
     implements I
 end structure
 interface [|I|]
-end interface")
+end interface", metadataDefinitions:={"mscorlib:Object", "mscorlib:ValueType"})
         End Function
 
         <Fact, Trait(Traits.Feature, Traits.Features.GoToBase)>
@@ -170,7 +170,7 @@ end interface
 interface [|J1|]
 end interface
 interface [|J2|]
-end interface")
+end interface", metadataDefinitions:={"mscorlib:Object", "mscorlib:ValueType"})
         End Function
 
 #End Region