diff --git a/lolafect/data_testing.py b/lolafect/data_testing.py
index 1d0dc11..dda959a 100644
--- a/lolafect/data_testing.py
+++ b/lolafect/data_testing.py
@@ -1,3 +1,4 @@
+from typing import List
 from urllib.parse import quote_plus as urlquote
 
 import prefect
@@ -8,6 +9,7 @@ from great_expectations.data_context.types.base import (
     DatasourceConfig,
     S3StoreBackendDefaults,
 )
+from great_expectations.expectations.expectation import ExpectationConfiguration
 
 from lolafect.defaults import DEFAULT_GREAT_EXPECTATIONS_S3_BUCKET
 
@@ -17,7 +19,7 @@ def run_data_test_on_mysql(
     name: str,
     mysql_credentials: dict,
     query: str,
-    expectations: dict,
+    expectation_configurations: List[ExpectationConfiguration],
     great_expectations_s3_bucket: str = DEFAULT_GREAT_EXPECTATIONS_S3_BUCKET,
 ) -> dict:
     """
@@ -26,7 +28,7 @@ def run_data_test_on_mysql(
     :param name: a unique name for the data test.
     :param mysql_credentials: credentials for the MySQL instance.
     :param query: the query to test against.
-    :param expectations: the expectations on the dataset.
+    :param expectation_configurations: the expectations on the dataset.
     :param great_expectations_s3_bucket: the bucket where Great Expectations
     files live.
     :return: the result of the data test.
@@ -34,15 +36,15 @@ def run_data_test_on_mysql(
     logger = prefect.context.get("logger")
 
     logger.info("Creating data context.")
-    data_context = create_in_memory_data_context(
+    data_context = _create_in_memory_data_context(
         mysql_credentials, great_expectations_s3_bucket
     )
     logger.info("Data context created.")
     logger.info("Creating expectation suite.")
-    data_context = create_expectation_suite(data_context, name, expectations)
+    data_context = _create_expectation_suite(data_context, name, expectation_configurations)
     logger.info("Expectation suite created.")
     logger.info("Creating checkpoint.")
-    data_context = create_checkpoint(data_context, mysql_credentials, query, name)
+    data_context = _create_checkpoint(data_context, mysql_credentials, query, name)
     logger.info("Checkpoint created.")
     logger.info("Running checkpoint.")
     results = data_context.run_checkpoint(f"{name}_checkpoint")
@@ -52,10 +54,19 @@ def run_data_test_on_mysql(
     return results
 
 
-def create_in_memory_data_context(
+def _create_in_memory_data_context(
     mysql_credentials: dict,
     great_expectations_s3_bucket: str,
 ) -> AbstractDataContext:
+    """
+    Create a DataContext without a YAML config file.
+
+    :param mysql_credentials: the creds to the mysql where the query will be
+    executed.
+    :param great_expectations_s3_bucket: the name of the bucket where Great
+    Exepctations files while be stored.
+    :return: the data context.
+    """
 
     data_context = BaseDataContext(
         project_config=DataContextConfig(
@@ -93,9 +104,17 @@ def create_in_memory_data_context(
     return data_context
 
 
-def create_expectation_suite(
-    data_context, expectation_suite_name, expectation_configurations
-):
+def _create_expectation_suite(
+    data_context: AbstractDataContext, expectation_suite_name: str, expectation_configurations: List[ExpectationConfiguration]
+) -> AbstractDataContext:
+    """
+    Create a new expectation suite in the data context with the passed expectations.
+
+    :param data_context:
+    :param expectation_suite_name:
+    :param expectation_configurations:
+    :return:
+    """
     suite = data_context.create_expectation_suite(
         expectation_suite_name,
         overwrite_existing=True,
@@ -109,7 +128,7 @@ def create_expectation_suite(
     return data_context
 
 
-def create_checkpoint(
+def _create_checkpoint(
     data_context, mysql_credentials, query_for_checkpoint, expectation_suite_name
 ):
 
@@ -148,4 +167,3 @@ def create_checkpoint(
     data_context.add_checkpoint(**checkpoint_config)
 
     return data_context
-
diff --git a/tests/test_integration/test_data_testing.py b/tests/test_integration/test_data_testing.py
index b8219d0..0556735 100644
--- a/tests/test_integration/test_data_testing.py
+++ b/tests/test_integration/test_data_testing.py
@@ -59,7 +59,7 @@ def test_validation_on_mysql_succeeds():
             "db": TEST_LOLACONFIG.DW_CREDENTIALS["default_db"]
         },
         query=test_query,
-        expectations=test_expectations,
+        expectation_configurations=test_expectations,
     )
 
     closed_tunnel = close_ssh_tunnel.run(ssh_tunnel)
@@ -107,7 +107,7 @@ def test_validation_on_mysql_fails():
             "db": TEST_LOLACONFIG.DW_CREDENTIALS["default_db"]
         },
         query=test_query,
-        expectations=test_expectations,
+        expectation_configurations=test_expectations,
     )
 
     closed_tunnel = close_ssh_tunnel.run(ssh_tunnel)