diff --git a/source/index.ts b/source/index.ts
index 9f9886e..a819a5d 100644
--- a/source/index.ts
+++ b/source/index.ts
@@ -16,6 +16,7 @@ export const enum TypeName {
 	number = 'number',
 	symbol = 'symbol',
 	Function = 'Function',
+	Generator = 'Generator',
 	GeneratorFunction = 'GeneratorFunction',
 	AsyncFunction = 'AsyncFunction',
 	Observable = 'Observable',
diff --git a/test/test.ts b/test/test.ts
index 479a028..c8536ec 100644
--- a/test/test.ts
+++ b/test/test.ts
@@ -21,9 +21,7 @@ const createDomElement = (element: string) => document.createElement(element);
 
 interface Test {
 	fixtures: unknown[];
-
-	// Cannot be TypeName because TypeName.GeneratorFunction does not match 'Generator'
-	typename?: TypeName | 'Generator';
+	typename?: TypeName;
 	is(value: unknown): boolean;
 }
 
@@ -181,7 +179,7 @@ const types = new Map<string, Test>([
 				yield 4;
 			})()
 		],
-		typename: 'Generator'
+		typename: TypeName.Generator
 	}],
 	['generatorFunction', {
 		is: is.generatorFunction,