diff --git a/.evergreen/.evg.yml b/.evergreen/.evg.yml
index b1fb4571ef..c232f86849 100644
--- a/.evergreen/.evg.yml
+++ b/.evergreen/.evg.yml
@@ -320,7 +320,7 @@ functions:
         working_dir: "src"
         script: |
           ${PREPARE_SHELL}
-          MONGODB_URI="${MONGODB_URI}" TOPOLOGY=${TOPOLOGY} RVM_RUBY="${RVM_RUBY}" .evergreen/run-tests.sh
+          MONGODB_URI="${MONGODB_URI}" TOPOLOGY=${TOPOLOGY} RVM_RUBY="${RVM_RUBY}" RAILS="${RAILS}" DRIVER="${DRIVER}" .evergreen/run-tests.sh
 
   "cleanup":
     - command: shell.exec
diff --git a/.evergreen/run-tests.sh b/.evergreen/run-tests.sh
index 59917a218e..ff2614b703 100644
--- a/.evergreen/run-tests.sh
+++ b/.evergreen/run-tests.sh
@@ -30,9 +30,9 @@ EOH
 
 gem install bundler
 
-if [ "$DRIVER" == "master" ]; then
+if [ $DRIVER == "master" ]; then
   bundle install --gemfile=gemfiles/driver_master.gemfile
-elif [ "$RAILS" == "master" ]; then
+elif [ $RAILS == "master" ]; then
     bundle install --gemfile=gemfiles/rails_master.gemfile
 else
   bundle install