diff --git a/.evergreen/config.yml b/.evergreen/config.yml
index 17e1e93221..61ef8d6db6 100644
--- a/.evergreen/config.yml
+++ b/.evergreen/config.yml
@@ -186,24 +186,29 @@ functions:
         script: |
           ${PREPARE_SHELL}
           find $MONGO_ORCHESTRATION_HOME -name \*.log | xargs tar czf mongodb-logs.tar.gz
+    - command: ec2.assume_role
+      params:
+        role_arn: ${assume_role_arn}
     - command: s3.put
       params:
-        aws_key: ${aws_key}
-        aws_secret: ${aws_secret}
+        aws_key: ${AWS_ACCESS_KEY_ID}
+        aws_secret: ${AWS_SECRET_ACCESS_KEY}
+        aws_session_token: ${AWS_SESSION_TOKEN}
         local_file: mongodb-logs.tar.gz
-        remote_file: ${UPLOAD_BUCKET}/${build_variant}/${revision}/${version_id}/${build_id}/logs/${task_id}-${execution}-mongodb-logs.tar.gz
-        bucket: mciuploads
+        remote_file: ${build_variant}/${revision}/${version_id}/${build_id}/logs/${task_id}-${execution}-mongodb-logs.tar.gz
+        bucket: ${aws_bucket}
         permissions: public-read
         content_type: ${content_type|application/x-gzip}
         display_name: "mongodb-logs.tar.gz"
     - command: s3.put
       params:
-        aws_key: ${aws_key}
-        aws_secret: ${aws_secret}
+        aws_key: ${AWS_ACCESS_KEY_ID}
+        aws_secret: ${AWS_SECRET_ACCESS_KEY}
+        aws_session_token: ${AWS_SESSION_TOKEN}
         optional: true
         local_file: ${PROJECT_DIRECTORY}/fuzz.tgz
-        remote_file: ${UPLOAD_BUCKET}/${build_variant}/${revision}/${version_id}/${build_id}/${task_id}-${execution}-fuzz.tgz
-        bucket: mciuploads
+        remote_file: ${build_variant}/${revision}/${version_id}/${build_id}/${task_id}-${execution}-fuzz.tgz
+        bucket: ${aws_bucket}
         permissions: public-read
         content_type: application/x-gzip
         display_name: "fuzz.tgz"
@@ -216,12 +221,13 @@ functions:
           find . -name \*.suite | xargs tar czf test_suite.tgz
     - command: s3.put
       params:
-        aws_key: ${aws_key}
-        aws_secret: ${aws_secret}
+        aws_key: ${AWS_ACCESS_KEY_ID}
+        aws_secret: ${AWS_SECRET_ACCESS_KEY}
+        aws_session_token: ${AWS_SESSION_TOKEN}
         local_file: src/go.mongodb.org/mongo-driver/test_suite.tgz
         optional: true
-        remote_file: ${UPLOAD_BUCKET}/${build_variant}/${revision}/${version_id}/${build_id}/logs/${task_id}-${execution}-test_suite.tgz
-        bucket: mciuploads
+        remote_file: ${build_variant}/${revision}/${version_id}/${build_id}/logs/${task_id}-${execution}-test_suite.tgz
+        bucket: ${aws_bucket}
         permissions: public-read
         content_type: ${content_type|text/plain}
         display_name: "test_suite.tgz"