diff --git a/.circleci/config.yml b/.circleci/config.yml
index 2ac7b6319e51..c1335e3d2ec3 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -119,6 +119,7 @@ build-steps: &build-steps
           if [ "$RUN_TESTS" != "false" ]; then
             cd src
             ninja -C out/Default third_party/electron_node:headers
+            export ELECTRON_OUT_DIR=Default
             (cd electron && npm run test -- --ci --enable-logging)
           fi
     - <<: *notify-slack-failure
@@ -195,6 +196,7 @@ mac-build-steps: &mac-build-steps
           if [ "$RUN_TESTS" != "false" ]; then
             cd src
             ninja -C out/Default third_party/electron_node:headers
+            export ELECTRON_OUT_DIR=Default
             (cd electron && npm run test -- --ci --enable-logging)
           fi
     - <<: *notify-slack-failure
diff --git a/appveyor.yml b/appveyor.yml
index 005b85713409..2fa527201ea0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -4,6 +4,7 @@ image: libcc-20-vs2017-15.7.4
 environment:
   GIT_CACHE_PATH: C:\Users\electron\libcc_cache
   DISABLE_CRASH_REPORTER_TESTS: true
+  ELECTRON_OUT_DIR: Default
 build_script:
   - ps: >-
       if(($env:APPVEYOR_PULL_REQUEST_HEAD_REPO_NAME -split "/")[0] -eq ($env:APPVEYOR_REPO_NAME -split "/")[0]) {