Explicit interface for nothing()

types/jasmine/index.d.ts

@@ -93,7 +93,7 @@ declare function expect<T>(actual: T): jasmine.Matchers<T>;
 /**
  * Create an expectation for a spec.
  */
-declare function expect(): jasmine.Matchers<undefined>;
+declare function expect(): jasmine.NothingMatcher;
 
 /**
  * Explicitly mark a spec as failed.
@@ -446,7 +446,6 @@ declare namespace jasmine {
         toThrow(expected?: any): boolean;
         toThrowError(message?: string | RegExp): boolean;
         toThrowError(expected?: new (...args: any[]) => Error, message?: string | RegExp): boolean;
-        nothing(): Any;
 
         not: Matchers<T>;
 
@@ -460,6 +459,10 @@ declare namespace jasmine {
         not: ArrayLikeMatchers<T>;
     }
 
+    interface NothingMatcher {
+        nothing(): void;
+    }
+
     interface Reporter {
         reportRunnerStarting(runner: Runner): void;
         reportRunnerResults(runner: Runner): void;