No material widget found in test

I am getting the No material widget found error when I run the following test, even though I am wrapping it in a MaterialApp. Any pointers to why that is?

Detailed error log: The following assertion was thrown building _InkResponseStateWidget(gestures: [tap], mouseCursor: null, BoxShape.circle, dirty, state: _InkResponseState#3ef96): No Material widget found. _InkResponseStateWidget widgets require a Material widget ancestor. In material design, most widgets are conceptually "printed" on a sheet of material. In Flutter's material library, that material is represented by the Material widget. It is the Material widget that renders ink splashes, for instance. Because of this, many material library widgets require that there be a Material widget in the tree above them. To introduce a Material widget, you can either directly include one, or use a widget that contains Material itself, such as a Card, Dialog, Drawer, or Scaffold. The specific widget that could not find a Material ancestor was: _InkResponseStateWidget The ancestors of this widget were: ... InkResponse Positioned Stack GridTile Consumer<ExamInformation> ...