diff --git a/vega/vega-tests.ts b/vega/vega-tests.ts
index 2cbf9d7b9..bdb4973b3 100644
--- a/vega/vega-tests.ts
+++ b/vega/vega-tests.ts
@@ -1287,7 +1287,7 @@ var specs: Vega.Spec[] = [
             "name": "x",
             "type": "linear",
             "range": "width",
-            "reverse": {"field": "index"},
+            "reverse": true,
             "nice": true,
             "domain": {"data": "pop2000", "field": "data.people"}
           }
diff --git a/vinyl-fs/vinyl-fs-tests.ts b/vinyl-fs/vinyl-fs-tests.ts
index 9fbc45faf..a29746166 100644
--- a/vinyl-fs/vinyl-fs-tests.ts
+++ b/vinyl-fs/vinyl-fs-tests.ts
@@ -379,7 +379,7 @@ describe('dest stream', function () {
          cwd: __dirname,
          path: inputPath,
          contents: expectedContents,
-         stat: {
+         stat: <fs.Stats>{
             mode: expectedMode
          }
       });
@@ -420,7 +420,7 @@ describe('dest stream', function () {
          cwd: __dirname,
          path: inputPath,
          contents: contentStream,
-         stat: {
+         stat: <fs.Stats>{
             mode: expectedMode
          }
       });
@@ -463,7 +463,7 @@ describe('dest stream', function () {
          cwd: __dirname,
          path: inputPath,
          contents: null,
-         stat: {
+         stat: <fs.Stats>{
             isDirectory: function () {
                return true;
             },
@@ -713,7 +713,7 @@ describe('symlink stream', function () {
          cwd: __dirname,
          path: inputPath,
          contents: expectedContents,
-         stat: {
+         stat: <fs.Stats>{
             mode: expectedMode
          }
       });
@@ -754,7 +754,7 @@ describe('symlink stream', function () {
          cwd: __dirname,
          path: inputPath,
          contents: contentStream,
-         stat: {
+         stat: <fs.Stats>{
             mode: expectedMode
          }
       });
@@ -797,7 +797,7 @@ describe('symlink stream', function () {
          cwd: __dirname,
          path: inputPath,
          contents: null,
-         stat: {
+         stat: <fs.Stats>{
             isDirectory: function () {
                return true;
             },
@@ -874,7 +874,7 @@ describe('symlink stream', function () {
          cwd: __dirname,
          path: inputPath,
          contents: expectedContents,
-         stat: {
+         stat: <fs.Stats>{
             mode: expectedMode
          }
       });