     XCTAssertEqual(MDCTextInputControllerFullWidth.inlinePlaceholderFontDefault,
                    UIFont.systemFont(ofSize: 6))
 
-    // Test the changes to the class properties can propogate to an instance.
+    // Test the changes to the class properties can propagate to an instance.
     controller = MDCTextInputControllerFullWidth(textInput: textField)
 
     XCTAssertEqual(controller.disabledColor, .clear)

class TextFieldControllerClassPropertiesTests: XCTestCase {
  override func tearDown() {
    super.tearDown()

    MDCTextInputControllerUnderline.roundedCornersDefault = []
    MDCTextInputControllerUnderline.errorColorDefault = nil

    MDCTextInputControllerUnderline.roundedCornersDefault = [.bottomRight]
    XCTAssertEqual(MDCTextInputControllerUnderline.roundedCornersDefault, [.bottomRight])

    // Test that the changes to the class properties can propagate to an instance.
    controller = MDCTextInputControllerUnderline(textInput: textField)

    XCTAssertEqual(controller.errorColor, MDCTextInputControllerUnderline.errorColorDefault)
