diff --git a/.appveyor.yml b/.appveyor.yml
deleted file mode 100644
index db631d033b53..000000000000
--- a/.appveyor.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-image: Visual Studio 2017
-
-version: '{build}'
-
-environment:
-  matrix:
-    - nodejs_version: "8"
-
-install:
-  # Get the latest stable version of Node.js
-  - ps: Install-Product node $env:nodejs_version
-  # install modules
-  - npm install
-
-test_script:
-  - npm --silent run minifyRelease
-  - npm --silent run build-specs
-  - npm --silent run test -- --browsers IE --webgl-stub --release --suppressPassed
-
-# Don't actually build.
-build: off
diff --git a/.travis.yml b/.travis.yml
index 0011687bc9b3..dbd07e5d8370 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "10"
+  - "12"
 addons:
   chrome: stable
   firefox: latest
diff --git a/Specs/.eslintrc.json b/Specs/.eslintrc.json
index 253d3533baa8..b1a827ceac51 100644
--- a/Specs/.eslintrc.json
+++ b/Specs/.eslintrc.json
@@ -9,7 +9,7 @@
     "overrides": [
         {
             "files": [
-                "karma.conf.js"
+                "karma.conf.cjs"
             ],
             "parserOptions": {
                 "sourceType": "script"
diff --git a/Specs/karma.conf.js b/Specs/karma.conf.cjs
similarity index 100%
rename from Specs/karma.conf.js
rename to Specs/karma.conf.cjs
diff --git a/gulpfile.cjs b/gulpfile.cjs
index 4e159b3c826c..6f543cda527c 100644
--- a/gulpfile.cjs
+++ b/gulpfile.cjs
@@ -42,7 +42,7 @@ if (/\.0$/.test(version)) {
   version = version.substring(0, version.length - 2);
 }
 
-var karmaConfigFile = path.join(__dirname, "Specs/karma.conf.js");
+var karmaConfigFile = path.join(__dirname, "Specs/karma.conf.cjs");
 var travisDeployUrl =
   "http://cesium-dev.s3-website-us-east-1.amazonaws.com/cesium/";
 
@@ -115,7 +115,7 @@ var filesToConvertES6 = [
   "!Source/Workers/cesiumWorkerBootstrapper.js",
   "!Source/Workers/transferTypedArrayTest.js",
   "!Specs/karma-main.js",
-  "!Specs/karma.conf.js",
+  "!Specs/karma.conf.cjs",
   "!Specs/spec-main.js",
   "!Specs/SpecList.js",
   "!Specs/TestWorkers/**",