diff --git a/.circleci/config.yml b/.circleci/config.yml
index 32afc1aa66e30..dc5175f113b90 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -277,8 +277,8 @@ jobs:
       - *run_yarn
       - run:
           environment:
-            RELEASE_CHANNEL: stable
-          command: yarn test-build --maxWorkers=2
+            RELEASE_CHANNEL: experimental
+          command: yarn test-build-devtools --maxWorkers=2
 
   test_dom_fixtures:
     docker: *docker
@@ -376,7 +376,7 @@ workflows:
             - build
       - test_build_devtools:
           requires:
-            - build
+            - build_experimental
       - test_dom_fixtures:
           requires:
             - build
diff --git a/packages/react-devtools-shared/src/__tests__/inspectedElementContext-test.js b/packages/react-devtools-shared/src/__tests__/inspectedElementContext-test.js
index 0e7aa1788d929..f476cfee365da 100644
--- a/packages/react-devtools-shared/src/__tests__/inspectedElementContext-test.js
+++ b/packages/react-devtools-shared/src/__tests__/inspectedElementContext-test.js
@@ -514,6 +514,7 @@ describe('InspectedElementContext', () => {
     const arrayOfArrays = [[['abc', 123, true], []]];
     const div = document.createElement('div');
     const exampleFunction = () => {};
+    const exampleDateISO = '2019-12-31T23:42:42.000Z';
     const setShallow = new Set(['abc', 123]);
     const mapShallow = new Map([['name', 'Brian'], ['food', 'sushi']]);
     const setOfSets = new Set([new Set(['a', 'b', 'c']), new Set([1, 2, 3])]);
@@ -542,7 +543,7 @@ describe('InspectedElementContext', () => {
           // eslint-disable-next-line no-undef
           big_int={BigInt(123)}
           data_view={dataView}
-          date={new Date(123)}
+          date={new Date(exampleDateISO)}
           fn={exampleFunction}
           html_element={div}
           immutable={immutableMap}
@@ -634,11 +635,11 @@ describe('InspectedElementContext', () => {
 
     expect(date[meta.inspectable]).toBe(false);
     expect(date[meta.type]).toBe('date');
-    expect(date[meta.preview_long]).toBe(
-      'Wed Dec 31 1969 16:00:00 GMT-0800 (Pacific Standard Time)',
+    expect(new Date(date[meta.preview_long]).toISOString()).toBe(
+      exampleDateISO,
     );
-    expect(date[meta.preview_short]).toBe(
-      'Wed Dec 31 1969 16:00:00 GMT-0800 (Pacific Standard Time)',
+    expect(new Date(date[meta.preview_short]).toISOString()).toBe(
+      exampleDateISO,
     );
 
     expect(fn[meta.inspectable]).toBe(false);
diff --git a/scripts/jest/config.build-devtools.js b/scripts/jest/config.build-devtools.js
index 357bf831ef17d..9c8501486ab49 100644
--- a/scripts/jest/config.build-devtools.js
+++ b/scripts/jest/config.build-devtools.js
@@ -14,7 +14,13 @@ const packages = readdirSync(packagesRoot).filter(dir => {
     return false;
   }
   const packagePath = join(packagesRoot, dir, 'package.json');
-  return statSync(packagePath).isFile();
+  let stat;
+  try {
+    stat = statSync(packagePath);
+  } catch (err) {
+    return false;
+  }
+  return stat.isFile();
 });
 
 // Create a module map to point React packages to the build output
diff --git a/scripts/jest/config.build.js b/scripts/jest/config.build.js
index 558bece9eaca8..765909b41b164 100644
--- a/scripts/jest/config.build.js
+++ b/scripts/jest/config.build.js
@@ -11,7 +11,13 @@ const packages = readdirSync(packagesRoot).filter(dir => {
     return false;
   }
   const packagePath = join(packagesRoot, dir, 'package.json');
-  return statSync(packagePath).isFile();
+  let stat;
+  try {
+    stat = statSync(packagePath);
+  } catch (err) {
+    return false;
+  }
+  return stat.isFile();
 });
 
 // Create a module map to point React packages to the build output
diff --git a/scripts/jest/preprocessor.js b/scripts/jest/preprocessor.js
index 9be5f5bbd451f..ee8de9408edda 100644
--- a/scripts/jest/preprocessor.js
+++ b/scripts/jest/preprocessor.js
@@ -68,11 +68,14 @@ module.exports = {
       // for test files, we also apply the async-await transform, but we want to
       // make sure we don't accidentally apply that transform to product code.
       const isTestFile = !!filePath.match(/\/__tests__\//);
+      const isInDevToolsPackages = !!filePath.match(
+        /\/packages\/react-devtools.*\//
+      );
       const testOnlyPlugins = [pathToBabelPluginAsyncToGenerator];
-      const sourceOnlyPlugins =
-        process.env.NODE_ENV === 'development'
-          ? [pathToBabelPluginReplaceConsoleCalls]
-          : [];
+      const sourceOnlyPlugins = [];
+      if (process.env.NODE_ENV === 'development' && !isInDevToolsPackages) {
+        sourceOnlyPlugins.push(pathToBabelPluginReplaceConsoleCalls);
+      }
       const plugins = (isTestFile ? testOnlyPlugins : sourceOnlyPlugins).concat(
         babelOptions.plugins
       );