diff --git a/Gruntfile.js b/Gruntfile.js
index d6707beca..174db85cd 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -511,7 +511,6 @@ grunt.registerTask( "lint", [
 ] );
 grunt.registerTask( "build", [ "requirejs", "concat" ] );
 grunt.registerTask( "default", [ "lint", "build" ] );
-grunt.registerTask( "jenkins", [ "build" ] );
 grunt.registerTask( "sizer", [ "requirejs:js", "uglify:main", "compare_size:all" ] );
 grunt.registerTask( "sizer_all", [ "requirejs:js", "uglify", "compare_size" ] );
 
diff --git a/package.json b/package.json
index 081eb81d1..926a1ce6e 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,6 @@
 		"load-grunt-tasks": "5.1.0",
 		"rimraf": "4.4.1",
 		"selenium-webdriver": "4.18.1",
-		"testswarm": "1.1.2",
 		"yargs": "17.7.2"
 	},
 	"keywords": []
diff --git a/tests/lib/bootstrap.js b/tests/lib/bootstrap.js
index fd9b1eb65..acc79d379 100644
--- a/tests/lib/bootstrap.js
+++ b/tests/lib/bootstrap.js
@@ -14,14 +14,12 @@ requirejs.config( {
 		"qunit-assert-classes": "../../lib/vendor/qunit-assert-classes/qunit-assert-classes",
 		"qunit-assert-close": "../../lib/vendor/qunit-assert-close/qunit-assert-close",
 		"qunit": "../../../external/qunit/qunit",
-		"testswarm": "https://swarm.jquery.org/js/inject.js?" + ( new Date() ).getTime(),
 		"ui": "../../../ui"
 	},
 	shim: {
 		"globalize/ja-JP": [ "globalize" ],
 		"jquery-simulate": [ "jquery" ],
-		"qunit-assert-close": [ "qunit" ],
-		"testswarm": [ "qunit" ]
+		"qunit-assert-close": [ "qunit" ]
 	}
 } );
 
@@ -67,11 +65,6 @@ function requireTests( dependencies, noBackCompat ) {
 
 	dependencies = preDependencies.concat( dependencies );
 
-	// Load the TestSwarm injector, if necessary
-	if ( parseUrl().swarmURL ) {
-		dependencies.push( "testswarm" );
-	}
-
 	requireModules( dependencies, function( QUnit ) {
 		QUnit.start();
 	} );
diff --git a/tests/unit/datepicker/options.js b/tests/unit/datepicker/options.js
index bf2fccc1f..6615f2351 100644
--- a/tests/unit/datepicker/options.js
+++ b/tests/unit/datepicker/options.js
@@ -98,14 +98,6 @@ QUnit.test( "change", function( assert ) {
 } );
 
 ( function() {
-	var url = window.location.search;
-	url = decodeURIComponent( url.slice( url.indexOf( "swarmURL=" ) + 9 ) );
-
-	// TODO: This test occassionally fails in IE in TestSwarm
-	if ( $.ui.ie && url && url.indexOf( "http" ) === 0 ) {
-		return;
-	}
-
 	QUnit.test( "invocation", function( assert ) {
 		var ready = assert.async();
 		var button, image,
diff --git a/tests/unit/draggable/options.js b/tests/unit/draggable/options.js
index c98c9f9d8..129c23692 100644
--- a/tests/unit/draggable/options.js
+++ b/tests/unit/draggable/options.js
@@ -1173,9 +1173,7 @@ QUnit.test( "#6817: auto scroll goes double distance when dragging", function( a
 			scroll: true,
 			stop: function( e, ui ) {
 				assert.equal( ui.offset.top, newY, "offset of item matches pointer position after scroll" );
-
-				// TODO: fix IE8 testswarm IFRAME positioning bug so assert.close can be turned back to equal
-				assert.close( ui.offset.top - offsetBefore.top, distance, 1, "offset of item only moves expected distance after scroll" );
+				assert.equal( ui.offset.top - offsetBefore.top, distance, 1, "offset of item only moves expected distance after scroll" );
 			}
 		} ),
 		scrollSensitivity = element.draggable( "option", "scrollSensitivity" ),
@@ -1231,9 +1229,8 @@ QUnit.test( "snap, snapMode, and snapTolerance", function( assert ) {
 		moves: 1
 	} );
 
-	// TODO: fix IE8 testswarm IFRAME positioning bug so assert.close can be turned back to equal
-	assert.close( element.offset().left, newX, 1, "doesn't snap outside the snapTolerance" );
-	assert.close( element.offset().top, newY, 1, "doesn't snap outside the snapTolerance" );
+	assert.equal( element.offset().left, newX, 1, "doesn't snap outside the snapTolerance" );
+	assert.equal( element.offset().top, newY, 1, "doesn't snap outside the snapTolerance" );
 
 	newX += 3;
 
@@ -1362,10 +1359,8 @@ QUnit.test( "#8459: element can snap to an element that was removed during drag"
 		assert.ok( true, "Opera <12.14 and Safari <6.0 report wrong values for $.contains in jQuery < 1.8" );
 		assert.ok( true, "Opera <12.14 and Safari <6.0 report wrong values for $.contains in jQuery < 1.8" );
 	} else {
-
-		// TODO: fix IE8 testswarm IFRAME positioning bug so assert.close can be turned back to equal
-		assert.close( element.offset().left, newX, 1, "doesn't snap to a removed element" );
-		assert.close( element.offset().top, newY, 1, "doesn't snap to a removed element" );
+		assert.equal( element.offset().left, newX, 1, "doesn't snap to a removed element" );
+		assert.equal( element.offset().top, newY, 1, "doesn't snap to a removed element" );
 	}
 } );
 
diff --git a/tests/unit/position/core.js b/tests/unit/position/core.js
index 9483e716d..ae016f34c 100644
--- a/tests/unit/position/core.js
+++ b/tests/unit/position/core.js
@@ -396,8 +396,6 @@ QUnit.test( "collision: fit, no collision", function( assert ) {
 	}, "with offset" );
 } );
 
-// Currently failing in IE8 due to the iframe used by TestSwarm
-if ( !/msie [\w.]+/.exec( navigator.userAgent.toLowerCase() ) ) {
 QUnit.test( "collision: fit, collision", function( assert ) {
 	assert.expect( 2 + ( scrollTopSupport() ? 1 : 0 ) );
 
@@ -428,7 +426,6 @@ QUnit.test( "collision: fit, collision", function( assert ) {
 		win.scrollTop( 0 ).scrollLeft( 0 );
 	}
 } );
-}
 
 QUnit.test( "collision: flip, no collision", function( assert ) {
 	assert.expect( 2 );