diff --git a/gulpfile.js b/gulpfile.js
index 65cecb977..9f707bfa0 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -32,10 +32,9 @@ module.exports = {
   buildCompressed: buildTasks.compressed,
   buildGenerators: buildTasks.generators,
   buildAdvancedCompilationTest: buildTasks.advancedCompilationTest,
+  checkin: gulp.series(buildTasks.checkinBuilt, typings.checkinTypings),
   checkinBuilt: buildTasks.checkinBuilt,
-  clean: gulp.series(
-      buildTasks.cleanBuildDir,
-      packageTasks.cleanReleaseDir),
+  clean: gulp.series(buildTasks.cleanBuildDir, packageTasks.cleanReleaseDir),
   cleanBuildDir: buildTasks.cleanBuildDir,
   cleanReleaseDir: packageTasks.cleanReleaseDir,
   gitSyncDevelop: gitTasks.syncDevelop,
@@ -43,6 +42,7 @@ module.exports = {
   gitCreateRC: gitTasks.createRC,
   gitUpdateGithubPages: gitTasks.updateGithubPages,
   typings: gulp.series(typings.typings, typings.msgTypings),
+  checkinTypings: typings.checkinTypings,
   package: packageTasks.package,
   checkLicenses: licenseTasks.checkLicenses,
   recompile: releaseTasks.recompile,
diff --git a/package.json b/package.json
index 7f345709d..41308cf5e 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,9 @@
     "clean": "gulp clean",
     "clean:build": "gulp cleanBuildDir",
     "clean:release": "gulp cleanReleaseDir",
-    "checkin": "gulp checkinBuilt",
+    "checkin": "gulp checkin",
+    "checkin:built": "gulp checkinBuilt",
+    "checkin:typings": "gulp checkinTypings",
     "deployDemos": "gulp deployDemos",
     "format": "git-clang-format",
     "format:sortrequires": "gulp sortRequires",
diff --git a/scripts/gulpfiles/release_tasks.js b/scripts/gulpfiles/release_tasks.js
index b0faa759f..c4480f06c 100644
--- a/scripts/gulpfiles/release_tasks.js
+++ b/scripts/gulpfiles/release_tasks.js
@@ -178,6 +178,7 @@ const recompile = gulp.series(
   buildTasks.build,
   buildTasks.checkinBuilt,
   typings.typings,
+  typings.checkinTypings,
   gitTasks.pushRebuildBranch
   );
 
diff --git a/scripts/gulpfiles/typings.js b/scripts/gulpfiles/typings.js
index 67b94f59c..4f4a82845 100644
--- a/scripts/gulpfiles/typings.js
+++ b/scripts/gulpfiles/typings.js
@@ -16,6 +16,7 @@ var path = require('path');
 var fs = require('fs');
 var rimraf = require('rimraf');
 var execSync = require('child_process').execSync;
+var {BUILD_DIR} = require('./config');
 
 /**
  * Recursively generates a list of file paths with the specified extension
@@ -94,7 +95,7 @@ function typings() {
   ];
   return gulp.src(srcs)
     .pipe(gulp.concat('blockly.d.ts'))
-    .pipe(gulp.dest('typings'))
+    .pipe(gulp.dest(BUILD_DIR))
     .on('end', function () {
       // Clean up tmp directory.
       if (fs.existsSync(tmpDir)) {
@@ -110,12 +111,24 @@ function msgTypings(cb) {
   msgFiles.forEach(msg => {
     const localeName = msg.substring(0, msg.indexOf('.json'));
     const msgTypings = template.slice().replace(/<%= locale %>/gi, localeName);
-    fs.writeFileSync(path.join('typings', 'msg', localeName + '.d.ts'), msgTypings, 'utf-8');
+    fs.writeFileSync(path.join(BUILD_DIR, 'msg', localeName + '.d.ts'), msgTypings, 'utf-8');
   })
   cb();
 }
 
+/**
+ * This task copies built files from BUILD_DIR back to the repository
+ * so they can be committed to git.
+ */
+function checkinTypings() {
+  return gulp.src([
+    `${BUILD_DIR}/**.d.ts`,
+    `${BUILD_DIR}/**/**.d.ts`,
+  ]).pipe(gulp.dest('typings'));
+};
+
 module.exports = {
   typings: typings,
-  msgTypings: msgTypings
+  msgTypings: msgTypings,
+  checkinTypings: checkinTypings,
 };
diff --git a/tests/scripts/compile_typings.sh b/tests/scripts/compile_typings.sh
index ee16beb56..893407732 100755
--- a/tests/scripts/compile_typings.sh
+++ b/tests/scripts/compile_typings.sh
@@ -1,21 +1,21 @@
 #!/bin/bash
 
+# Location that npm run typings will write .d.ts files to.
+readonly BUILD_DIR='built'
+
 # ANSI colors
 BOLD_GREEN='\033[1;32m'
 BOLD_RED='\033[1;31m'
 ANSI_RESET='\033[0m'
 
-# Download TypeScript to obtain the compiler.
-echo "Downloading TypeScript"
-npm install typescript
-
 # Generate Blockly typings.
 echo "Generating Blockly typings"
 npm run typings
 
 # Use the TypeScript compiler to compile the generated typings.
 echo "Compiling typings"
-cd typings
+
+cd "${BUILD_DIR}"
 ../node_modules/.bin/tsc blockly.d.ts