Tests for #12690 proving the problem with bender.tools.

bender.js

@@ -85,7 +85,11 @@ var config = {
 				'tests/plugins/magicline/widgets#test commands[previous], first block in nested': 'env.gecko',
 				'tests/plugins/magicline/widgets#test commands[next], block after block in nested': 'env.gecko',
 				'tests/plugins/magicline/widgets#test commands[previous], block before block in nested': 'env.gecko',
-				'tests/plugins/magicline/widgets#test commands[next], last block in nested': 'env.gecko'
+				'tests/plugins/magicline/widgets#test commands[next], last block in nested': 'env.gecko',
+
+				// Safari (#12690)
+				'tests/plugins/font/font#test apply font size over another font size (collapsed selection in empty span)': 'env.safari',
+				'tests/plugins/font/font#test apply font size over another font size (deeply nested collapsed selection)': 'env.safari'
 			}
 		},
 
@@ -117,7 +121,11 @@ var config = {
 			paths: [
 				'utils/**',
 				'!**/_*/**'
-			]
+			],
+			regressions: {
+				// Safari (#12690)
+				'tests/utils/selection/setgetwithhtml#test setSelection - in empty inline element': 'env.safari'
+			}
 		}
 	}
 };

tests/core/selection/selection.js

@@ -229,6 +229,23 @@ bender.test( {
 			'the selection was located after the strong element' );
 	},
 
+	// #12690
+	'test selectRanges - inside empty inline element': function() {
+		var editor = this.editor,
+			range = editor.createRange();
+
+		editor.editable().setHtml( '<p>x<span style="font-size:48px"><strong id="target"></strong></span>x</p>' );
+
+		var strong = editor.document.getById( 'target' );
+		range.setStart( strong, 0 );
+		range.collapse( true );
+
+		editor.getSelection().selectRanges( [ range ] );
+
+		var sel = editor.getSelection();
+		assert.isTrue( strong.equals( sel.getStartElement() ) );
+	},
+
 	'test getSelectedElement': function() {
 		testSelectedElement( '[<img />]', 'img' );
 		testSelectedElement( '[<hr />]', 'hr' );

tests/utils/selection/setgetwithhtml.js

@@ -100,6 +100,16 @@
 			} );
 		},
 
+		// #12690
+		'test setSelection - in empty inline element': function() {
+			var editor = this.editor;
+
+			bender.tools.selection.setWithHtml( editor, '<p>x<span style="font-size:48px"><strong>[]</strong></span>x</p>' );
+
+			var sel = editor.getSelection();
+			assert.areSame( 'strong', sel.getStartElement().getName() );
+		},
+
 		'test getSelection - element': function() {
 			var editor = this.editor,
 				htmlWithRange = '<p>[x]</p>';