diff --git a/src/containers/paper-canvas.jsx b/src/containers/paper-canvas.jsx
index 254e730a..7941fa32 100644
--- a/src/containers/paper-canvas.jsx
+++ b/src/containers/paper-canvas.jsx
@@ -254,6 +254,7 @@ class PaperCanvas extends React.Component {
 
 PaperCanvas.propTypes = {
     canvasRef: PropTypes.func,
+    changeFormat: PropTypes.func.isRequired,
     clearHoveredItem: PropTypes.func.isRequired,
     clearPasteOffset: PropTypes.func.isRequired,
     clearSelectedItems: PropTypes.func.isRequired,
diff --git a/src/helper/undo.js b/src/helper/undo.js
index f342f245..a069f516 100644
--- a/src/helper/undo.js
+++ b/src/helper/undo.js
@@ -9,7 +9,7 @@ import log from '../log/log';
 /**
  * Take an undo snapshot
  * @param {function} dispatchPerformSnapshot Callback to dispatch a state update
- * @param {Formats} either bitmap or vector
+ * @param {Formats} format Either Formats.BITMAP or Formats.VECTOR
  */
 const performSnapshot = function (dispatchPerformSnapshot, format) {
     const guideLayers = hideGuideLayers();
diff --git a/test/unit/format-reducer.test.js b/test/unit/format-reducer.test.js
index 7bcf357f..42527852 100644
--- a/test/unit/format-reducer.test.js
+++ b/test/unit/format-reducer.test.js
@@ -23,9 +23,9 @@ test('undoRedoChangeFormat', () => {
     let reduxState = reducer(defaultState /* state */, changeFormat(Formats.BITMAP) /* action */);
     expect(reduxState).toBe(Formats.BITMAP);
     reduxState = reducer(reduxState /* state */, undo(Formats.UNDO_BITMAP) /* action */);
-    expect().toBe(Formats.UNDO_BITMAP);
+    expect(reduxState).toBe(Formats.UNDO_BITMAP);
     reduxState = reducer(reduxState /* state */, redo(Formats.UNDO_VECTOR) /* action */);
-    expect().toBe(Formats.UNDO_VECTOR);
+    expect(reduxState).toBe(Formats.UNDO_VECTOR);
 });
 
 test('invalidChangeMode', () => {