diff --git a/.evergreen/.evg.yml b/.evergreen/.evg.yml
index 375b980a1f0..5c528baf86c 100644
--- a/.evergreen/.evg.yml
+++ b/.evergreen/.evg.yml
@@ -155,7 +155,7 @@ functions:
           ${PREPARE_SHELL}
           REQUIRE_API_VERSION=${REQUIRE_API_VERSION} LOAD_BALANCER=${LOAD_BALANCER} MONGODB_VERSION=${VERSION} TOPOLOGY=${TOPOLOGY} \
           AUTH=${AUTH} SSL=${SSL} STORAGE_ENGINE=${STORAGE_ENGINE} ORCHESTRATION_FILE=${ORCHESTRATION_FILE} \
-          INSTALL_LEGACY_SHELL=${INSTALL_LEGACY_SHELL} sh ${DRIVERS_TOOLS}/.evergreen/run-orchestration.sh
+          INSTALL_LEGACY_SHELL=${INSTALL_LEGACY_SHELL} bash ${DRIVERS_TOOLS}/.evergreen/run-orchestration.sh
     # run-orchestration generates expansion file with the MONGODB_URI for the cluster
     - command: expansions.update
       params:
@@ -630,7 +630,7 @@ functions:
           OCSP_TLS_SHOULD_SUCCEED="${OCSP_TLS_SHOULD_SUCCEED}" \
           OCSP_MUST_STAPLE="${OCSP_MUST_STAPLE}" \
           JAVA_VERSION="${JAVA_VERSION}" \
-          sh ${PROJECT_DIRECTORY}/.evergreen/run-ocsp-test.sh
+          bash ${PROJECT_DIRECTORY}/.evergreen/run-ocsp-test.sh
 
   "run-valid-ocsp-server-ca-responder":
     - command: shell.exec