diff --git a/tests/unit/dialog/dialog_deprecated.js b/tests/unit/dialog/dialog_deprecated.js
index fcbd22faa..918190791 100644
--- a/tests/unit/dialog/dialog_deprecated.js
+++ b/tests/unit/dialog/dialog_deprecated.js
@@ -1,26 +1,36 @@
 module("dialog (deprecated): position option with string and array");
 
-if ( !$.ui.ie ) {
-	test("position, right bottom on window w/array", function() {
-		expect( 2 );
-		var el = $('<div></div>').dialog({ position: ["right", "bottom"] }),
-			dialog = el.dialog('widget'),
-			offset = dialog.offset();
-		closeEnough(offset.left, $(window).width() - dialog.outerWidth() + $(window).scrollLeft(), 1);
-		closeEnough(offset.top, $(window).height() - dialog.outerHeight() + $(window).scrollTop(), 1);
-		el.remove();
-	});
+test( "position, right bottom on window w/array", function() {
+	expect( 2 );
 
-	test("position, right bottom on window", function() {
-		expect( 2 );
-		var el = $('<div></div>').dialog({ position: "right bottom" }),
-			dialog = el.dialog('widget'),
-			offset = dialog.offset();
-		closeEnough(offset.left, $(window).width() - dialog.outerWidth() + $(window).scrollLeft(), 1);
-		closeEnough(offset.top, $(window).height() - dialog.outerHeight() + $(window).scrollTop(), 1);
-		el.remove();
-	});
-}
+	// dialogs alter the window width and height in FF and IE7
+	// so we collect that information before creating the dialog
+	// Support: FF, IE7
+	var winWidth = $( window ).width(),
+		winHeight = $( window ).height(),
+		el = $("<div></div>").dialog({ position: [ "right", "bottom" ] }),
+		dialog = el.dialog("widget"),
+		offset = dialog.offset();
+	closeEnough( offset.left, winWidth - dialog.outerWidth() + $( window ).scrollLeft(), 1, "offset left of right bottom on window w/array" );
+	closeEnough( offset.top, winHeight - dialog.outerHeight() + $( window ).scrollTop(), 1, "offset top of right bottom on window w/array" );
+	el.remove();
+});
+
+test( "position, right bottom on window", function() {
+	expect( 2 );
+
+	// dialogs alter the window width and height in FF and IE7
+	// so we collect that information before creating the dialog
+	// Support: FF, IE7
+	var winWidth = $( window ).width(),
+		winHeight = $( window ).height(),
+		el = $("<div></div>").dialog({ position: "right bottom" }),
+		dialog = el.dialog("widget"),
+		offset = dialog.offset();
+	closeEnough( offset.left, winWidth - dialog.outerWidth() + $( window ).scrollLeft(), 1, "offset left of right bottom on window" );
+	closeEnough( offset.top, winHeight - dialog.outerHeight() + $( window ).scrollTop(), 1, "offset top of right bottom on window" );
+	el.remove();
+});
 
 test("position, offset from top left w/array", function() {
 	expect( 2 );
diff --git a/tests/unit/dialog/dialog_options.js b/tests/unit/dialog/dialog_options.js
index 2ccbed573..dff3ffaae 100644
--- a/tests/unit/dialog/dialog_options.js
+++ b/tests/unit/dialog/dialog_options.js
@@ -338,36 +338,45 @@ test("minWidth", function() {
 	el.remove();
 });
 
-test("position, default center on window", function() {
+test( "position, default center on window", function() {
 	expect( 2 );
-	var el = $('<div></div>').dialog(),
-		dialog = el.dialog('widget'),
+
+	// dialogs alter the window width and height in FF and IE7
+	// so we collect that information before creating the dialog
+	// Support: FF, IE7
+	var winWidth = $( window ).width(),
+		winHeight = $( window ).height(),
+		el = $("<div></div>").dialog(),
+		dialog = el.dialog("widget"),
 		offset = dialog.offset();
-	closeEnough(offset.left, Math.round($(window).width() / 2 - dialog.outerWidth() / 2) + $(window).scrollLeft(), 1);
-	closeEnough(offset.top, Math.round($(window).height() / 2 - dialog.outerHeight() / 2) + $(window).scrollTop(), 1);
+	closeEnough( offset.left, Math.round( winWidth / 2 - dialog.outerWidth() / 2 ) + $( window ).scrollLeft(), 1, "dialog left position of center on window on initilization" );
+	closeEnough( offset.top, Math.round( winHeight / 2 - dialog.outerHeight() / 2 ) + $( window ).scrollTop(), 1, "dialog top position of center on window on initilization" );
 	el.remove();
 });
 
-// todo: figure out these fails in IE7
-if ( !$.ui.ie ) {
-	test("position, right bottom at right bottom via ui.position args", function() {
-		expect( 2 );
-		var el = $('<div></div>').dialog({
-				position: {
-					my: "right bottom",
-					at: "right bottom"
-				}
-			}),
-			dialog = el.dialog('widget'),
-			offset = dialog.offset();
+test( "position, right bottom at right bottom via ui.position args", function() {
+	expect( 2 );
 
-		closeEnough(offset.left, $(window).width() - dialog.outerWidth() + $(window).scrollLeft(), 1);
-		closeEnough(offset.top, $(window).height() - dialog.outerHeight() + $(window).scrollTop(), 1);
-		el.remove();
-	});
-}
+	// dialogs alter the window width and height in FF and IE7
+	// so we collect that information before creating the dialog
+	// Support: FF, IE7
+	var winWidth = $( window ).width(),
+		winHeight = $( window ).height(),
+		el = $("<div></div>").dialog({
+			position: {
+				my: "right bottom",
+				at: "right bottom"
+			}
+		}),
+		dialog = el.dialog("widget"),
+		offset = dialog.offset();
 
-test("position, at another element", function() {
+	closeEnough( offset.left, winWidth - dialog.outerWidth() + $( window ).scrollLeft(), 1, "dialog left position of right bottom at right bottom on initilization" );
+	closeEnough( offset.top, winHeight - dialog.outerHeight() + $( window ).scrollTop(), 1, "dialog top position of right bottom at right bottom on initilization" );
+	el.remove();
+});
+
+test( "position, at another element", function() {
 	expect( 4 );
 	var parent = $('<div></div>').css({
 			position: 'absolute',
@@ -375,32 +384,34 @@ test("position, at another element", function() {
 			left: 600,
 			height: 10,
 			width: 10
-		}).appendTo('body'),
+		}).appendTo("body"),
 
-		el = $('<div></div>').dialog({
+		el = $("<div></div>").dialog({
 			position: {
 				my: "left top",
 				at: "left top",
-				of: parent
+				of: parent,
+				collision: "none"
 			}
 		}),
 
-		dialog = el.dialog('widget'),
+		dialog = el.dialog("widget"),
 		offset = dialog.offset();
 
-	deepEqual(offset.left, 600);
-	deepEqual(offset.top, 400);
+	closeEnough( offset.left, 600, 1, "dialog left position at another element on initilization" );
+	closeEnough( offset.top, 400, 1, "dialog top position at another element on initilization" );
 
-	el.dialog('option', 'position', {
+	el.dialog("option", "position", {
 			my: "left top",
 			at: "right bottom",
-			of: parent
+			of: parent,
+			collision: "none"
 	});
 
 	offset = dialog.offset();
 
-	deepEqual(offset.left, 610);
-	deepEqual(offset.top, 410);
+	closeEnough( offset.left, 610, 1, "dialog left position at another element via setting option" );
+	closeEnough( offset.top, 410, 1, "dialog top position at another element via setting option" );
 
 	el.remove();
 	parent.remove();
diff --git a/tests/unit/dialog/dialog_test_helpers.js b/tests/unit/dialog/dialog_test_helpers.js
index ef0b9b6fa..e104ed63f 100644
--- a/tests/unit/dialog/dialog_test_helpers.js
+++ b/tests/unit/dialog/dialog_test_helpers.js
@@ -9,7 +9,7 @@ TestHelpers.dialog = {
 		});
 	},
 	testDrag: function(el, dx, dy, expectedDX, expectedDY, msg) {
-		var actual, expected, offsetAfter,
+		var actualDX, actualDY, offsetAfter,
 			d = el.dialog('widget'),
 			handle = $(".ui-dialog-titlebar", d),
 			offsetBefore = d.offset();
@@ -20,9 +20,9 @@ TestHelpers.dialog = {
 
 		msg = msg ? msg + "." : "";
 
-		actual = { left: Math.round(offsetAfter.left), top: Math.round(offsetAfter.top) },
-		expected = { left: Math.round(offsetBefore.left + expectedDX), top: Math.round(offsetBefore.top + expectedDY) };
-		deepEqual(actual, expected, 'dragged[' + expectedDX + ', ' + expectedDY + '] ' + msg);
+		actualDX = offsetAfter.left - offsetBefore.left;
+		actualDY = offsetAfter.top - offsetBefore.top;
+		ok( expectedDX - actualDX <= 1 && expectedDY - actualDY <= 1, 'dragged[' + expectedDX + ', ' + expectedDY + '] ' + msg);
 	},
 	shouldResize: function(el, dw, dh, msg) {
 		var heightAfter, widthAfter, actual, expected,