diff --git a/.travis.yml b/.travis.yml
index 31fc33cbf7..0be6725621 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -55,6 +55,7 @@ matrix:
     - env: "CI_MODE=browserstack_optional"
 
 before_install:
+  # source the env.sh script so that the exported variables are available to other scripts later on
   - source ./scripts/ci/env.sh print
 
 install:
diff --git a/scripts/ci/install.sh b/scripts/ci/install.sh
index 012894b579..01b0fffb5f 100755
--- a/scripts/ci/install.sh
+++ b/scripts/ci/install.sh
@@ -50,7 +50,6 @@ if [[ ${TRAVIS} && (${CI_MODE} == "aio" || ${CI_MODE} == "docs_test") ]]; then
   # angular.io: Install all yarn dependencies according to angular.io/yarn.lock
   travisFoldStart "yarn-install.aio"
     (
-      printenv
       cd ${PROJECT_ROOT}/aio
       yarn install
     )