diff --git a/tests/baselines/reference/InvalidNonInstantiatedModule.errors.txt b/tests/baselines/reference/InvalidNonInstantiatedModule.errors.txt
index 9fd7043faa6..bcfb27652c9 100644
--- a/tests/baselines/reference/InvalidNonInstantiatedModule.errors.txt
+++ b/tests/baselines/reference/InvalidNonInstantiatedModule.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/conformance/internalModules/moduleDeclarations/InvalidNonInstantiatedModule.ts(5,9): error TS2304: Cannot find name 'M'.
-tests/cases/conformance/internalModules/moduleDeclarations/InvalidNonInstantiatedModule.ts(7,15): error TS2304: Cannot find name 'M'.
+tests/cases/conformance/internalModules/moduleDeclarations/InvalidNonInstantiatedModule.ts(5,9): error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
+tests/cases/conformance/internalModules/moduleDeclarations/InvalidNonInstantiatedModule.ts(7,15): error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
 
 
 ==== tests/cases/conformance/internalModules/moduleDeclarations/InvalidNonInstantiatedModule.ts (2 errors) ====
@@ -9,9 +9,9 @@ tests/cases/conformance/internalModules/moduleDeclarations/InvalidNonInstantiate
     
     var m = M; // Error, not instantiated can not be used as var
             ~
-!!! error TS2304: Cannot find name 'M'.
+!!! error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
     
     var x: typeof M; // Error only a namespace
                   ~
-!!! error TS2304: Cannot find name 'M'.
+!!! error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/aliasOnMergedModuleInterface.errors.txt b/tests/baselines/reference/aliasOnMergedModuleInterface.errors.txt
index 009d405c0f5..ae56be397fe 100644
--- a/tests/baselines/reference/aliasOnMergedModuleInterface.errors.txt
+++ b/tests/baselines/reference/aliasOnMergedModuleInterface.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/aliasOnMergedModuleInterface_1.ts(5,16): error TS2304: Cannot find name 'foo'.
+tests/cases/compiler/aliasOnMergedModuleInterface_1.ts(5,16): error TS2708: Cannot use namespace 'foo' as a value here because it has no value export.
 
 
 ==== tests/cases/compiler/aliasOnMergedModuleInterface_1.ts (1 errors) ====
@@ -8,7 +8,7 @@ tests/cases/compiler/aliasOnMergedModuleInterface_1.ts(5,16): error TS2304: Cann
     z.bar("hello"); // This should be ok
     var x: foo.A = foo.bar("hello"); // foo.A should be ok but foo.bar should be error
                    ~~~
-!!! error TS2304: Cannot find name 'foo'.
+!!! error TS2708: Cannot use namespace 'foo' as a value here because it has no value export.
     
 ==== tests/cases/compiler/aliasOnMergedModuleInterface_0.ts (0 errors) ====
     declare module "foo"
diff --git a/tests/baselines/reference/assignToModule.errors.txt b/tests/baselines/reference/assignToModule.errors.txt
index 26121d72a05..f7abfa90bf7 100644
--- a/tests/baselines/reference/assignToModule.errors.txt
+++ b/tests/baselines/reference/assignToModule.errors.txt
@@ -1,8 +1,8 @@
-tests/cases/compiler/assignToModule.ts(2,1): error TS2304: Cannot find name 'A'.
+tests/cases/compiler/assignToModule.ts(2,1): error TS2708: Cannot use namespace 'A' as a value here because it has no value export.
 
 
 ==== tests/cases/compiler/assignToModule.ts (1 errors) ====
     module A {}
     A = undefined; // invalid LHS
     ~
-!!! error TS2304: Cannot find name 'A'.
\ No newline at end of file
+!!! error TS2708: Cannot use namespace 'A' as a value here because it has no value export.
\ No newline at end of file
diff --git a/tests/baselines/reference/assignmentToReferenceTypes.errors.txt b/tests/baselines/reference/assignmentToReferenceTypes.errors.txt
index 7e323479d57..8c937e02766 100644
--- a/tests/baselines/reference/assignmentToReferenceTypes.errors.txt
+++ b/tests/baselines/reference/assignmentToReferenceTypes.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/assignmentToReferenceTypes.ts(5,1): error TS2304: Cannot find name 'M'.
+tests/cases/compiler/assignmentToReferenceTypes.ts(5,1): error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
 tests/cases/compiler/assignmentToReferenceTypes.ts(9,1): error TS2539: Cannot assign to 'C' because it is not a variable.
 tests/cases/compiler/assignmentToReferenceTypes.ts(13,1): error TS2539: Cannot assign to 'E' because it is not a variable.
 tests/cases/compiler/assignmentToReferenceTypes.ts(16,1): error TS2539: Cannot assign to 'f' because it is not a variable.
@@ -11,7 +11,7 @@ tests/cases/compiler/assignmentToReferenceTypes.ts(16,1): error TS2539: Cannot a
     }
     M = null;
     ~
-!!! error TS2304: Cannot find name 'M'.
+!!! error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
     
     class C {
     }
diff --git a/tests/baselines/reference/assignments.errors.txt b/tests/baselines/reference/assignments.errors.txt
index 86bbe75cd4b..2c3fff0be59 100644
--- a/tests/baselines/reference/assignments.errors.txt
+++ b/tests/baselines/reference/assignments.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(11,1): error TS2304: Cannot find name 'M'.
+tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(11,1): error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
 tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(14,1): error TS2539: Cannot assign to 'C' because it is not a variable.
 tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(17,1): error TS2539: Cannot assign to 'E' because it is not a variable.
 tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(18,3): error TS2540: Cannot assign to 'A' because it is a constant or a read-only property.
@@ -19,7 +19,7 @@ tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(31,1): er
     module M { }
     M = null; // Error
     ~
-!!! error TS2304: Cannot find name 'M'.
+!!! error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
     
     class C { }
     C = null; // Error
diff --git a/tests/baselines/reference/defaultArgsInFunctionExpressions.errors.txt b/tests/baselines/reference/defaultArgsInFunctionExpressions.errors.txt
index b0b0f876be4..889a6c3ce79 100644
--- a/tests/baselines/reference/defaultArgsInFunctionExpressions.errors.txt
+++ b/tests/baselines/reference/defaultArgsInFunctionExpressions.errors.txt
@@ -5,7 +5,7 @@ tests/cases/compiler/defaultArgsInFunctionExpressions.ts(11,1): error TS2322: Ty
 tests/cases/compiler/defaultArgsInFunctionExpressions.ts(14,51): error TS2352: Type 'string' cannot be converted to type 'number'.
 tests/cases/compiler/defaultArgsInFunctionExpressions.ts(17,41): error TS2322: Type '""' is not assignable to type 'number'.
 tests/cases/compiler/defaultArgsInFunctionExpressions.ts(20,62): error TS2352: Type 'string' cannot be converted to type 'number'.
-tests/cases/compiler/defaultArgsInFunctionExpressions.ts(28,15): error TS2304: Cannot find name 'T'.
+tests/cases/compiler/defaultArgsInFunctionExpressions.ts(28,15): error TS2708: Cannot use namespace 'T' as a value here because it has no value export.
 
 
 ==== tests/cases/compiler/defaultArgsInFunctionExpressions.ts (8 errors) ====
@@ -52,7 +52,7 @@ tests/cases/compiler/defaultArgsInFunctionExpressions.ts(28,15): error TS2304: C
     
     var f6 = (t = T) => { };
                   ~
-!!! error TS2304: Cannot find name 'T'.
+!!! error TS2708: Cannot use namespace 'T' as a value here because it has no value export.
     var f7 = (t = U) => { return t; };
     
     f7().x;
\ No newline at end of file
diff --git a/tests/baselines/reference/genericTypeReferenceWithoutTypeArgument2.errors.txt b/tests/baselines/reference/genericTypeReferenceWithoutTypeArgument2.errors.txt
index 7635608f58e..05d88ae9d39 100644
--- a/tests/baselines/reference/genericTypeReferenceWithoutTypeArgument2.errors.txt
+++ b/tests/baselines/reference/genericTypeReferenceWithoutTypeArgument2.errors.txt
@@ -15,7 +15,7 @@ tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenc
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(18,38): error TS2314: Generic type 'I<T>' requires 1 type argument(s).
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(20,17): error TS2689: Cannot extend an interface 'I'. Did you mean 'implements'?
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(23,21): error TS2314: Generic type 'I<T>' requires 1 type argument(s).
-tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(29,18): error TS2304: Cannot find name 'M'.
+tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(29,18): error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(30,24): error TS2314: Generic type 'E<T>' requires 1 type argument(s).
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(31,24): error TS2694: Namespace 'M' has no exported member 'C'.
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(33,22): error TS2314: Generic type 'I<T>' requires 1 type argument(s).
@@ -89,7 +89,7 @@ tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenc
     
     class D2 extends M.C { }
                      ~
-!!! error TS2304: Cannot find name 'M'.
+!!! error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
     interface D3<T extends M.E> { }
                            ~~~
 !!! error TS2314: Generic type 'E<T>' requires 1 type argument(s).
diff --git a/tests/baselines/reference/importDeclWithClassModifiers.errors.txt b/tests/baselines/reference/importDeclWithClassModifiers.errors.txt
index e1b8867d069..8c82322d384 100644
--- a/tests/baselines/reference/importDeclWithClassModifiers.errors.txt
+++ b/tests/baselines/reference/importDeclWithClassModifiers.errors.txt
@@ -1,11 +1,11 @@
 tests/cases/compiler/importDeclWithClassModifiers.ts(5,8): error TS1044: 'public' modifier cannot appear on a module or namespace element.
-tests/cases/compiler/importDeclWithClassModifiers.ts(5,26): error TS2304: Cannot find name 'x'.
+tests/cases/compiler/importDeclWithClassModifiers.ts(5,26): error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
 tests/cases/compiler/importDeclWithClassModifiers.ts(5,28): error TS2694: Namespace 'x' has no exported member 'c'.
 tests/cases/compiler/importDeclWithClassModifiers.ts(6,8): error TS1044: 'private' modifier cannot appear on a module or namespace element.
-tests/cases/compiler/importDeclWithClassModifiers.ts(6,27): error TS2304: Cannot find name 'x'.
+tests/cases/compiler/importDeclWithClassModifiers.ts(6,27): error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
 tests/cases/compiler/importDeclWithClassModifiers.ts(6,29): error TS2694: Namespace 'x' has no exported member 'c'.
 tests/cases/compiler/importDeclWithClassModifiers.ts(7,8): error TS1044: 'static' modifier cannot appear on a module or namespace element.
-tests/cases/compiler/importDeclWithClassModifiers.ts(7,26): error TS2304: Cannot find name 'x'.
+tests/cases/compiler/importDeclWithClassModifiers.ts(7,26): error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
 tests/cases/compiler/importDeclWithClassModifiers.ts(7,28): error TS2694: Namespace 'x' has no exported member 'c'.
 
 
@@ -18,21 +18,21 @@ tests/cases/compiler/importDeclWithClassModifiers.ts(7,28): error TS2694: Namesp
            ~~~~~~
 !!! error TS1044: 'public' modifier cannot appear on a module or namespace element.
                              ~
-!!! error TS2304: Cannot find name 'x'.
+!!! error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
                                ~
 !!! error TS2694: Namespace 'x' has no exported member 'c'.
     export private import b = x.c;
            ~~~~~~~
 !!! error TS1044: 'private' modifier cannot appear on a module or namespace element.
                               ~
-!!! error TS2304: Cannot find name 'x'.
+!!! error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
                                 ~
 !!! error TS2694: Namespace 'x' has no exported member 'c'.
     export static import c = x.c;
            ~~~~~~
 !!! error TS1044: 'static' modifier cannot appear on a module or namespace element.
                              ~
-!!! error TS2304: Cannot find name 'x'.
+!!! error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
                                ~
 !!! error TS2694: Namespace 'x' has no exported member 'c'.
     var b: a;
diff --git a/tests/baselines/reference/importDeclWithDeclareModifier.errors.txt b/tests/baselines/reference/importDeclWithDeclareModifier.errors.txt
index d69a88964cc..696926dd4a1 100644
--- a/tests/baselines/reference/importDeclWithDeclareModifier.errors.txt
+++ b/tests/baselines/reference/importDeclWithDeclareModifier.errors.txt
@@ -1,5 +1,5 @@
 tests/cases/compiler/importDeclWithDeclareModifier.ts(5,9): error TS1029: 'export' modifier must precede 'declare' modifier.
-tests/cases/compiler/importDeclWithDeclareModifier.ts(5,27): error TS2304: Cannot find name 'x'.
+tests/cases/compiler/importDeclWithDeclareModifier.ts(5,27): error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
 tests/cases/compiler/importDeclWithDeclareModifier.ts(5,29): error TS2694: Namespace 'x' has no exported member 'c'.
 
 
@@ -12,7 +12,7 @@ tests/cases/compiler/importDeclWithDeclareModifier.ts(5,29): error TS2694: Names
             ~~~~~~
 !!! error TS1029: 'export' modifier must precede 'declare' modifier.
                               ~
-!!! error TS2304: Cannot find name 'x'.
+!!! error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
                                 ~
 !!! error TS2694: Namespace 'x' has no exported member 'c'.
     var b: a;
diff --git a/tests/baselines/reference/importDeclWithExportModifier.errors.txt b/tests/baselines/reference/importDeclWithExportModifier.errors.txt
index 56e9a159afb..d211b750ca3 100644
--- a/tests/baselines/reference/importDeclWithExportModifier.errors.txt
+++ b/tests/baselines/reference/importDeclWithExportModifier.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/importDeclWithExportModifier.ts(5,19): error TS2304: Cannot find name 'x'.
+tests/cases/compiler/importDeclWithExportModifier.ts(5,19): error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
 tests/cases/compiler/importDeclWithExportModifier.ts(5,21): error TS2694: Namespace 'x' has no exported member 'c'.
 
 
@@ -9,7 +9,7 @@ tests/cases/compiler/importDeclWithExportModifier.ts(5,21): error TS2694: Namesp
     }
     export import a = x.c;
                       ~
-!!! error TS2304: Cannot find name 'x'.
+!!! error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
                         ~
 !!! error TS2694: Namespace 'x' has no exported member 'c'.
     var b: a;
diff --git a/tests/baselines/reference/importDeclWithExportModifierAndExportAssignment.errors.txt b/tests/baselines/reference/importDeclWithExportModifierAndExportAssignment.errors.txt
index ff3c47e9f33..fbe7fde272d 100644
--- a/tests/baselines/reference/importDeclWithExportModifierAndExportAssignment.errors.txt
+++ b/tests/baselines/reference/importDeclWithExportModifierAndExportAssignment.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/importDeclWithExportModifierAndExportAssignment.ts(5,19): error TS2304: Cannot find name 'x'.
+tests/cases/compiler/importDeclWithExportModifierAndExportAssignment.ts(5,19): error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
 tests/cases/compiler/importDeclWithExportModifierAndExportAssignment.ts(5,21): error TS2694: Namespace 'x' has no exported member 'c'.
 tests/cases/compiler/importDeclWithExportModifierAndExportAssignment.ts(6,1): error TS2309: An export assignment cannot be used in a module with other exported elements.
 
@@ -10,7 +10,7 @@ tests/cases/compiler/importDeclWithExportModifierAndExportAssignment.ts(6,1): er
     }
     export import a = x.c;
                       ~
-!!! error TS2304: Cannot find name 'x'.
+!!! error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
                         ~
 !!! error TS2694: Namespace 'x' has no exported member 'c'.
     export = x;
diff --git a/tests/baselines/reference/importStatementsInterfaces.errors.txt b/tests/baselines/reference/importStatementsInterfaces.errors.txt
index 313365fb191..d591997117f 100644
--- a/tests/baselines/reference/importStatementsInterfaces.errors.txt
+++ b/tests/baselines/reference/importStatementsInterfaces.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/internalModules/codeGeneration/importStatementsInterfaces.ts(23,19): error TS2304: Cannot find name 'a'.
+tests/cases/conformance/internalModules/codeGeneration/importStatementsInterfaces.ts(23,19): error TS2708: Cannot use namespace 'a' as a value here because it has no value export.
 
 
 ==== tests/cases/conformance/internalModules/codeGeneration/importStatementsInterfaces.ts (1 errors) ====
@@ -26,7 +26,7 @@ tests/cases/conformance/internalModules/codeGeneration/importStatementsInterface
         import b = a.inA;
         var m: typeof a;
                       ~
-!!! error TS2304: Cannot find name 'a'.
+!!! error TS2708: Cannot use namespace 'a' as a value here because it has no value export.
         var p: b.Point3D;
         var p = {x:0, y:0, z: 0 };
     }
diff --git a/tests/baselines/reference/interfaceNameAsIdentifier.errors.txt b/tests/baselines/reference/interfaceNameAsIdentifier.errors.txt
index 5be40b5b7b6..faa6a0096fa 100644
--- a/tests/baselines/reference/interfaceNameAsIdentifier.errors.txt
+++ b/tests/baselines/reference/interfaceNameAsIdentifier.errors.txt
@@ -1,5 +1,5 @@
 tests/cases/compiler/interfaceNameAsIdentifier.ts(4,1): error TS2693: 'C' only refers to a type, but is being used as a value here.
-tests/cases/compiler/interfaceNameAsIdentifier.ts(12,1): error TS2304: Cannot find name 'm2'.
+tests/cases/compiler/interfaceNameAsIdentifier.ts(12,1): error TS2708: Cannot use namespace 'm2' as a value here because it has no value export.
 
 
 ==== tests/cases/compiler/interfaceNameAsIdentifier.ts (2 errors) ====
@@ -18,5 +18,5 @@ tests/cases/compiler/interfaceNameAsIdentifier.ts(12,1): error TS2304: Cannot fi
     
     m2.C();
     ~~
-!!! error TS2304: Cannot find name 'm2'.
+!!! error TS2708: Cannot use namespace 'm2' as a value here because it has no value export.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/memberScope.errors.txt b/tests/baselines/reference/memberScope.errors.txt
index 017a28d5f71..1d69c350d7c 100644
--- a/tests/baselines/reference/memberScope.errors.txt
+++ b/tests/baselines/reference/memberScope.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/memberScope.ts(4,11): error TS2304: Cannot find name 'Basil'.
+tests/cases/compiler/memberScope.ts(4,11): error TS2708: Cannot use namespace 'Basil' as a value here because it has no value export.
 
 
 ==== tests/cases/compiler/memberScope.ts (1 errors) ====
@@ -7,7 +7,7 @@ tests/cases/compiler/memberScope.ts(4,11): error TS2304: Cannot find name 'Basil
       export module Basil { }
       var z = Basil.Pepper;
               ~~~~~
-!!! error TS2304: Cannot find name 'Basil'.
+!!! error TS2708: Cannot use namespace 'Basil' as a value here because it has no value export.
     }
     
     
\ No newline at end of file
diff --git a/tests/baselines/reference/moduleAsBaseType.errors.txt b/tests/baselines/reference/moduleAsBaseType.errors.txt
index ffa30ad0ab3..5313c28fbae 100644
--- a/tests/baselines/reference/moduleAsBaseType.errors.txt
+++ b/tests/baselines/reference/moduleAsBaseType.errors.txt
@@ -1,16 +1,16 @@
-tests/cases/compiler/moduleAsBaseType.ts(2,17): error TS2304: Cannot find name 'M'.
-tests/cases/compiler/moduleAsBaseType.ts(3,21): error TS2304: Cannot find name 'M'.
-tests/cases/compiler/moduleAsBaseType.ts(4,21): error TS2304: Cannot find name 'M'.
+tests/cases/compiler/moduleAsBaseType.ts(2,17): error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
+tests/cases/compiler/moduleAsBaseType.ts(3,21): error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
+tests/cases/compiler/moduleAsBaseType.ts(4,21): error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
 
 
 ==== tests/cases/compiler/moduleAsBaseType.ts (3 errors) ====
     module M {}
     class C extends M {}
                     ~
-!!! error TS2304: Cannot find name 'M'.
+!!! error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
     interface I extends M { }
                         ~
-!!! error TS2304: Cannot find name 'M'.
+!!! error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
     class C2 implements M { }
                         ~
-!!! error TS2304: Cannot find name 'M'.
\ No newline at end of file
+!!! error TS2708: Cannot use namespace 'M' as a value here because it has no value export.
\ No newline at end of file
diff --git a/tests/baselines/reference/moduleWithNoValuesAsType.errors.txt b/tests/baselines/reference/moduleWithNoValuesAsType.errors.txt
index c387f5d62f4..5636b97e8cd 100644
--- a/tests/baselines/reference/moduleWithNoValuesAsType.errors.txt
+++ b/tests/baselines/reference/moduleWithNoValuesAsType.errors.txt
@@ -1,20 +1,20 @@
-tests/cases/compiler/moduleWithNoValuesAsType.ts(2,8): error TS2304: Cannot find name 'A'.
-tests/cases/compiler/moduleWithNoValuesAsType.ts(7,8): error TS2304: Cannot find name 'B'.
-tests/cases/compiler/moduleWithNoValuesAsType.ts(15,8): error TS2304: Cannot find name 'C'.
+tests/cases/compiler/moduleWithNoValuesAsType.ts(2,8): error TS2708: Cannot use namespace 'A' as a value here because it has no value export.
+tests/cases/compiler/moduleWithNoValuesAsType.ts(7,8): error TS2708: Cannot use namespace 'B' as a value here because it has no value export.
+tests/cases/compiler/moduleWithNoValuesAsType.ts(15,8): error TS2708: Cannot use namespace 'C' as a value here because it has no value export.
 
 
 ==== tests/cases/compiler/moduleWithNoValuesAsType.ts (3 errors) ====
     module A { }
     var a: A; // error
            ~
-!!! error TS2304: Cannot find name 'A'.
+!!! error TS2708: Cannot use namespace 'A' as a value here because it has no value export.
     
     module B {
         interface I {}
     }
     var b: B; // error
            ~
-!!! error TS2304: Cannot find name 'B'.
+!!! error TS2708: Cannot use namespace 'B' as a value here because it has no value export.
     
     module C {
         module M {
@@ -24,4 +24,4 @@ tests/cases/compiler/moduleWithNoValuesAsType.ts(15,8): error TS2304: Cannot fin
     
     var c: C; // error
            ~
-!!! error TS2304: Cannot find name 'C'.
\ No newline at end of file
+!!! error TS2708: Cannot use namespace 'C' as a value here because it has no value export.
\ No newline at end of file
diff --git a/tests/baselines/reference/namespaceModule.errors.txt b/tests/baselines/reference/namespaceModule.errors.txt
new file mode 100644
index 00000000000..b23f9621c58
--- /dev/null
+++ b/tests/baselines/reference/namespaceModule.errors.txt
@@ -0,0 +1,19 @@
+tests/cases/compiler/namespaceModule.ts(3,1): error TS2708: Cannot use namespace 'z' as a value here because it has no value export.
+tests/cases/compiler/namespaceModule.ts(9,1): error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
+
+
+==== tests/cases/compiler/namespaceModule.ts (2 errors) ====
+    namespace z {}
+    
+    z;
+    ~
+!!! error TS2708: Cannot use namespace 'z' as a value here because it has no value export.
+    
+    namespace x {
+        export type z = string;
+    }
+    
+    x;
+    ~
+!!! error TS2708: Cannot use namespace 'x' as a value here because it has no value export.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/namespaceModule.js b/tests/baselines/reference/namespaceModule.js
new file mode 100644
index 00000000000..18bf3cf7b22
--- /dev/null
+++ b/tests/baselines/reference/namespaceModule.js
@@ -0,0 +1,15 @@
+//// [namespaceModule.ts]
+namespace z {}
+
+z;
+
+namespace x {
+    export type z = string;
+}
+
+x;
+
+
+//// [namespaceModule.js]
+z;
+x;
diff --git a/tests/baselines/reference/typeUsedAsValueError2.errors.txt b/tests/baselines/reference/typeUsedAsValueError2.errors.txt
index 3027abb0e6b..a471055913d 100644
--- a/tests/baselines/reference/typeUsedAsValueError2.errors.txt
+++ b/tests/baselines/reference/typeUsedAsValueError2.errors.txt
@@ -1,5 +1,5 @@
 tests/cases/compiler/world.ts(4,1): error TS2693: 'HelloInterface' only refers to a type, but is being used as a value here.
-tests/cases/compiler/world.ts(5,1): error TS2304: Cannot find name 'HelloNamespace'.
+tests/cases/compiler/world.ts(5,1): error TS2708: Cannot use namespace 'HelloNamespace' as a value here because it has no value export.
 
 
 ==== tests/cases/compiler/world.ts (2 errors) ====
@@ -11,7 +11,7 @@ tests/cases/compiler/world.ts(5,1): error TS2304: Cannot find name 'HelloNamespa
 !!! error TS2693: 'HelloInterface' only refers to a type, but is being used as a value here.
     HelloNamespace.world;
     ~~~~~~~~~~~~~~
-!!! error TS2304: Cannot find name 'HelloNamespace'.
+!!! error TS2708: Cannot use namespace 'HelloNamespace' as a value here because it has no value export.
 ==== tests/cases/compiler/helloInterface.ts (0 errors) ====
     interface HelloInterface {
         world: any;
diff --git a/tests/baselines/reference/typeofInternalModules.errors.txt b/tests/baselines/reference/typeofInternalModules.errors.txt
index c98456c3404..b84e65fe218 100644
--- a/tests/baselines/reference/typeofInternalModules.errors.txt
+++ b/tests/baselines/reference/typeofInternalModules.errors.txt
@@ -1,8 +1,8 @@
-tests/cases/compiler/typeofInternalModules.ts(15,16): error TS2304: Cannot find name 'importUninst'.
+tests/cases/compiler/typeofInternalModules.ts(15,16): error TS2708: Cannot use namespace 'importUninst' as a value here because it has no value export.
 tests/cases/compiler/typeofInternalModules.ts(17,9): error TS2304: Cannot find name 'Outer'.
 tests/cases/compiler/typeofInternalModules.ts(19,1): error TS2322: Type 'typeof Outer' is not assignable to type 'typeof instantiated'.
   Property 'C' is missing in type 'typeof Outer'.
-tests/cases/compiler/typeofInternalModules.ts(21,16): error TS2304: Cannot find name 'importUninst'.
+tests/cases/compiler/typeofInternalModules.ts(21,16): error TS2708: Cannot use namespace 'importUninst' as a value here because it has no value export.
 tests/cases/compiler/typeofInternalModules.ts(23,1): error TS2322: Type 'typeof instantiated' is not assignable to type 'typeof Outer'.
   Property 'instantiated' is missing in type 'typeof instantiated'.
 
@@ -24,7 +24,7 @@ tests/cases/compiler/typeofInternalModules.ts(23,1): error TS2322: Type 'typeof
     var x2: importInst.C = new x1();
     var x3: typeof importUninst.P; // Error again
                    ~~~~~~~~~~~~
-!!! error TS2304: Cannot find name 'importUninst'.
+!!! error TS2708: Cannot use namespace 'importUninst' as a value here because it has no value export.
     
     var x4: Outer = Outer;
             ~~~~~
@@ -37,7 +37,7 @@ tests/cases/compiler/typeofInternalModules.ts(23,1): error TS2322: Type 'typeof
     x5 = Outer.instantiated;
     var x6: typeof importUninst;
                    ~~~~~~~~~~~~
-!!! error TS2304: Cannot find name 'importUninst'.
+!!! error TS2708: Cannot use namespace 'importUninst' as a value here because it has no value export.
     var x7: typeof Outer = Outer;
     x7 = importInst;
     ~~
diff --git a/tests/cases/compiler/namespaceModule.ts b/tests/cases/compiler/namespaceModule.ts
new file mode 100644
index 00000000000..a1ad71d96a0
--- /dev/null
+++ b/tests/cases/compiler/namespaceModule.ts
@@ -0,0 +1,9 @@
+namespace z {}
+
+z;
+
+namespace x {
+    export type z = string;
+}
+
+x;