diff --git a/types/chai-jquery/index.d.ts b/types/chai-jquery/index.d.ts
index e1628f1743..e84a1ec272 100644
--- a/types/chai-jquery/index.d.ts
+++ b/types/chai-jquery/index.d.ts
@@ -10,21 +10,21 @@
 declare namespace Chai {
 
     interface Assertion {
-        attr: (name: string, value?: string) => Assertion;
-        prop: (name: string, value?: any) => Assertion;
-        css: (name: string, value?: string) => Assertion;
-        data: (name: string, value?: string) => Assertion;
+        attr(name: string, value?: string): Assertion;
+        prop(name: string, value?: any): Assertion;
+        css(name: string, value?: string): Assertion;
+        data(name: string, value?: string): Assertion;
         class(className: string): Assertion;
         id(id: string): Assertion;
         html(html: string): Assertion;
         text(text: string): Assertion;
         value(text: string): Assertion;
         descendants(selector: string): Assertion;
-        visible: Assertion;
-        hidden: Assertion;
-        selected: Assertion;
-        checked: Assertion;
-        disabled: Assertion;
+        visible(): Assertion;
+        hidden(): Assertion;
+        selected(): Assertion;
+        checked(): Assertion;
+        disabled(): Assertion;
         (selector: string): Assertion;
     }
 }