diff --git a/.evergreen/activate-kms-venv.sh b/.evergreen/activate-kms-venv.sh
index 4e8effc76c0..9abf37dc7bf 100755
--- a/.evergreen/activate-kms-venv.sh
+++ b/.evergreen/activate-kms-venv.sh
@@ -1,11 +1,7 @@
 #!/bin/bash
 set -o errexit  # Exit the script with error if any of the commands fail
 
-cd ${DRIVERS_TOOLS}/.evergreen/csfle
+pushd ${DRIVERS_TOOLS}/.evergreen/csfle
 . ./activate-kmstlsvenv.sh
 
-if [ "Windows_NT" = "$OS" ]; then
-  echo "export PYTHON_EXEC='kmstlsvenv/Scripts/python.exe'" > prepare-kmsvenv.sh
-else
-  echo "export PYTHON_EXEC='./kmstlsvenv/bin/python3'" > prepare-kmsvenv.sh
-fi
+popd
diff --git a/.evergreen/run-azure-kms-mock-server.sh b/.evergreen/run-azure-kms-mock-server.sh
index 06d07236e91..396106c2b66 100644
--- a/.evergreen/run-azure-kms-mock-server.sh
+++ b/.evergreen/run-azure-kms-mock-server.sh
@@ -4,6 +4,13 @@ if [ -z ${DRIVERS_TOOLS+omitted} ]; then echo "DRIVERS_TOOLS is unset" && exit 1
 
 set -o errexit
 
-python3 $DRIVERS_TOOLS/.evergreen/csfle/bottle.py fake_azure:imds &
+source ./activate-kms-venv.sh
+
+
+echo "Python version information"
+echo "which python?: ${which python}"
+echo "python -v: ${python -v}"
+
+python $DRIVERS_TOOLS/.evergreen/csfle/bottle.py fake_azure:imds &
 
 echo "Running Azure KMS idms server on port 8080"
diff --git a/.evergreen/run-kmip-server.sh b/.evergreen/run-kmip-server.sh
index c0a3f0f691d..42cea0bbd40 100755
--- a/.evergreen/run-kmip-server.sh
+++ b/.evergreen/run-kmip-server.sh
@@ -1,12 +1,14 @@
 #!/bin/bash
 set -o errexit  # Exit the script with error if any of the commands fail
 
-cd ${DRIVERS_TOOLS}/.evergreen/csfle
-. ./prepare-kmsvenv.sh
+source ./activate-kms-venv.sh
 
-echo "$PYTHON_EXEC"
 
-$PYTHON_EXEC -u kms_kmip_server.py \
+echo "Python version information"
+echo "which python?: ${which python}"
+echo "python -v: ${python -v}"
+
+python -u kms_kmip_server.py \
   --ca_file ../x509gen/ca.pem \
   --cert_file ../x509gen/server.pem \
   --port 5698
diff --git a/.evergreen/run-kms-servers.sh b/.evergreen/run-kms-servers.sh
index 8181a4d2f51..5658b1e676f 100755
--- a/.evergreen/run-kms-servers.sh
+++ b/.evergreen/run-kms-servers.sh
@@ -1,11 +1,12 @@
 #!/bin/bash
 set -o errexit  # Exit the script with error if any of the commands fail
 
-cd ${DRIVERS_TOOLS}/.evergreen/csfle
-. ./prepare-kmsvenv.sh
+source ./activate-kms-venv.sh
 
-echo "$PYTHON_EXEC"
+echo "Python version information"
+echo "which python?: ${which python}"
+echo "python -v: ${python -v}"
 
-$PYTHON_EXEC -u kms_http_server.py --ca_file ../x509gen/ca.pem --cert_file ../x509gen/expired.pem --port 8000 &
-$PYTHON_EXEC -u kms_http_server.py --ca_file ../x509gen/ca.pem --cert_file ../x509gen/wrong-host.pem --port 8001 &
-$PYTHON_EXEC -u kms_http_server.py --ca_file ../x509gen/ca.pem --cert_file ../x509gen/server.pem --port 8002 --require_client_cert &
+python -u kms_http_server.py --ca_file ../x509gen/ca.pem --cert_file ../x509gen/expired.pem --port 8000 &
+python -u kms_http_server.py --ca_file ../x509gen/ca.pem --cert_file ../x509gen/wrong-host.pem --port 8001 &
+python -u kms_http_server.py --ca_file ../x509gen/ca.pem --cert_file ../x509gen/server.pem --port 8002 --require_client_cert &
diff --git a/.evergreen/run-tests.sh b/.evergreen/run-tests.sh
index 755732b9def..d2a313445aa 100755
--- a/.evergreen/run-tests.sh
+++ b/.evergreen/run-tests.sh
@@ -45,7 +45,8 @@ if [[ -z "${CLIENT_ENCRYPTION}" ]]; then
   unset AWS_ACCESS_KEY_ID;
   unset AWS_SECRET_ACCESS_KEY;
 else
-  pip install --upgrade boto3
+  source "$DRIVERS_TOOLS/.evergreen/venv-utils.sh"
+  venvactivate "$DRIVERS_TOOLS/.evergreen/orchestration/venv"  pip install --upgrade boto3
   # Get access to the AWS temporary credentials:
   echo "adding temporary AWS credentials to environment"
   # CSFLE_AWS_TEMP_ACCESS_KEY_ID, CSFLE_AWS_TEMP_SECRET_ACCESS_KEY, CSFLE_AWS_TEMP_SESSION_TOKEN