diff --git a/jquery/jquery-tests.ts b/jquery/jquery-tests.ts
index a1c545a6f..08e66551a 100644
--- a/jquery/jquery-tests.ts
+++ b/jquery/jquery-tests.ts
@@ -1711,15 +1711,17 @@ function test_focusout() {
 }
 
 function test_easing() {
-    var easing = jQuery.easing,
-        easing_fns = ["linear", "swing"],
-        step = Math.pow( 2, -3 ); // use power of 2 to prevent floating point rounding error
-    easing_fns.forEach( function( name ) {
-        var fn = easing[ name ];
-        for( var i = 0; i <= 1; i += step ) {
-            console.log( "$.easing." + name + "(" + i + "): " + fn.call(easing, i) );
+    const easing = jQuery.easing;
+
+    function test_easing_function( name: string, fn: JQueryEasingFunction ) {
+        const step = Math.pow( 2, -3 ); // use power of 2 to prevent floating point rounding error
+        for( let i = 0; i <= 1; i += step ) {
+            console.log( `$.easing.${name}(${i}): ${fn.call(easing, i)}` );
         }
-    } );
+    }
+
+    test_easing_function( "linear", easing.linear );
+    test_easing_function( "swing", easing.swing );
 }
 
 function test_fx() {
diff --git a/jqueryui/jqueryui-tests.ts b/jqueryui/jqueryui-tests.ts
index 56a371f99..c6d4f110c 100644
--- a/jqueryui/jqueryui-tests.ts
+++ b/jqueryui/jqueryui-tests.ts
@@ -1820,22 +1820,43 @@ function test_widget() {
 }
 
 function test_easing() {
-    var easing = jQuery.easing,
-        easing_fns = ["easeInQuad", "easeOutQuad", "easeInOutQuad",
-			"easeInCubic", "easeOutCubic", "easeInOutCubic",
-			"easeInQuart", "easeOutQuart", "easeInOutQuart",
-			"easeInQuint", "easeOutQuint", "easeInOutQuint",
-			"easeInExpo", "easeOutExpo", "easeInOutExpo",
-			"easeInSine", "easeOutSine", "easeInOutSine",
-			"easeInCirc", "easeOutCirc", "easeInOutCirc",
-			"easeInElastic", "easeOutElastic", "easeInOutElastic",
-			"easeInBack", "easeOutBack", "easeInOutBack",
-			"easeInBounce", "easeOutBounce", "easeInOutBounce"],
-        step = Math.pow( 2, -3 ); // use power of 2 to prevent floating point rounding error
-    easing_fns.forEach( function( name ) {
-        var fn = easing[ name ];
-        for( var i = 0; i <= 1; i += step ) {
-            console.log( "$.easing." + name + "(" + i + "): " + fn.call(easing, i) );
+    const easing = jQuery.easing;
+
+    function test_easing_function( name: string, fn: JQueryEasingFunction ) {
+        const step = Math.pow( 2, -3 ); // use power of 2 to prevent floating point rounding error
+        for( let i = 0; i <= 1; i += step ) {
+            console.log( `$.easing.${name}(${i}): ${fn.call(easing, i)}` );
         }
-    } );
+    }
+
+    test_easing_function("easeInQuad", easing.easeInQuad);
+    test_easing_function("easeOutQuad", easing.easeOutQuad);
+    test_easing_function("easeInOutQuad", easing.easeInOutQuad);
+    test_easing_function("easeInCubic", easing.easeInCubic);
+    test_easing_function("easeOutCubic", easing.easeOutCubic);
+    test_easing_function("easeInOutCubic", easing.easeInOutCubic);
+    test_easing_function("easeInQuart", easing.easeInQuart);
+    test_easing_function("easeOutQuart", easing.easeOutQuart);
+    test_easing_function("easeInOutQuart", easing.easeInOutQuart);
+    test_easing_function("easeInQuint", easing.easeInQuint);
+    test_easing_function("easeOutQuint", easing.easeOutQuint);
+    test_easing_function("easeInOutQuint", easing.easeInOutQuint);
+    test_easing_function("easeInExpo", easing.easeInExpo);
+    test_easing_function("easeOutExpo", easing.easeOutExpo);
+    test_easing_function("easeInOutExpo", easing.easeInOutExpo);
+    test_easing_function("easeInSine", easing.easeInSine);
+    test_easing_function("easeOutSine", easing.easeOutSine);
+    test_easing_function("easeInOutSine", easing.easeInOutSine);
+    test_easing_function("easeInCirc", easing.easeInCirc);
+    test_easing_function("easeOutCirc", easing.easeOutCirc);
+    test_easing_function("easeInOutCirc", easing.easeInOutCirc);
+    test_easing_function("easeInElastic", easing.easeInElastic);
+    test_easing_function("easeOutElastic", easing.easeOutElastic);
+    test_easing_function("easeInOutElastic", easing.easeInOutElastic);
+    test_easing_function("easeInBack", easing.easeInBack);
+    test_easing_function("easeOutBack", easing.easeOutBack);
+    test_easing_function("easeInOutBack", easing.easeInOutBack);
+    test_easing_function("easeInBounce", easing.easeInBounce);
+    test_easing_function("easeOutBounce", easing.easeOutBounce);
+    test_easing_function("easeInOutBounce", easing.easeInOutBounce);
 }