diff --git a/clients/snowflake/merge.go b/clients/snowflake/merge.go
index abff0567c..dd9b50b94 100644
--- a/clients/snowflake/merge.go
+++ b/clients/snowflake/merge.go
@@ -13,7 +13,7 @@ import (
 	"github.com/artie-labs/transfer/lib/typing/ext"
 )
 
-func merge(tableData *optimization.TableData) (string, error) {
+func getMergeStatement(tableData *optimization.TableData) (string, error) {
 	var tableValues []string
 	var cols []string
 	var sflkCols []string
diff --git a/clients/snowflake/merge_test.go b/clients/snowflake/merge_test.go
index 1b7651606..cc0d82355 100644
--- a/clients/snowflake/merge_test.go
+++ b/clients/snowflake/merge_test.go
@@ -26,8 +26,8 @@ func (s *SnowflakeTestSuite) TestMergeNoDeleteFlag() {
 		LatestCDCTs:     time.Time{},
 	}
 
-	_, err := merge(tableData)
-	assert.Error(s.T(), err, "merge failed")
+	_, err := getMergeStatement(tableData)
+	assert.Error(s.T(), err, "getMergeStatement failed")
 
 }
 
@@ -62,8 +62,8 @@ func (s *SnowflakeTestSuite) TestMerge() {
 		LatestCDCTs:     time.Time{},
 	}
 
-	mergeSQL, err := merge(tableData)
-	assert.NoError(s.T(), err, "merge failed")
+	mergeSQL, err := getMergeStatement(tableData)
+	assert.NoError(s.T(), err, "getMergeStatement failed")
 	assert.Contains(s.T(), mergeSQL, "robin")
 	assert.Contains(s.T(), mergeSQL, "false")
 	assert.Contains(s.T(), mergeSQL, "1")
@@ -114,8 +114,8 @@ func (s *SnowflakeTestSuite) TestMergeWithSingleQuote() {
 		LatestCDCTs:     time.Time{},
 	}
 
-	mergeSQL, err := merge(tableData)
-	assert.NoError(s.T(), err, "merge failed")
+	mergeSQL, err := getMergeStatement(tableData)
+	assert.NoError(s.T(), err, "getMergeStatement failed")
 	assert.Contains(s.T(), mergeSQL, `I can\'t fail`)
 }
 
@@ -147,7 +147,7 @@ func (s *SnowflakeTestSuite) TestMergeJson() {
 		LatestCDCTs:     time.Time{},
 	}
 
-	mergeSQL, err := merge(tableData)
-	assert.NoError(s.T(), err, "merge failed")
+	mergeSQL, err := getMergeStatement(tableData)
+	assert.NoError(s.T(), err, "getMergeStatement failed")
 	assert.Contains(s.T(), mergeSQL, `"label": "2\\" pipe"`)
-}
\ No newline at end of file
+}
diff --git a/clients/snowflake/snowflake.go b/clients/snowflake/snowflake.go
index e658331b3..b7d8cf24a 100644
--- a/clients/snowflake/snowflake.go
+++ b/clients/snowflake/snowflake.go
@@ -16,6 +16,7 @@ import (
 
 type Store struct {
 	db.Store
+	testDB    bool // Used for testing
 	configMap *types.DwhToTablesConfigMap
 }
 
@@ -38,6 +39,16 @@ func (s *Store) GetConfigMap() *types.DwhToTablesConfigMap {
 }
 
 func (s *Store) Merge(ctx context.Context, tableData *optimization.TableData) error {
+	err := s.merge(ctx, tableData)
+	if AuthenticationExpirationErr(err) {
+		logger.FromContext(ctx).WithError(err).Warn("authentication has expired, will reload the Snowflake store")
+		s.ReestablishConnection(ctx)
+	}
+
+	return err
+}
+
+func (s *Store) merge(ctx context.Context, tableData *optimization.TableData) error {
 	if tableData.Rows == 0 {
 		// There's no rows. Let's skip.
 		return nil
@@ -88,23 +99,23 @@ func (s *Store) Merge(ctx context.Context, tableData *optimization.TableData) er
 	}
 
 	tableData.UpdateInMemoryColumns(tableConfig.Columns())
-	query, err := merge(tableData)
+	query, err := getMergeStatement(tableData)
 	if err != nil {
-		log.WithError(err).Warn("failed to generate the merge query")
+		log.WithError(err).Warn("failed to generate the getMergeStatement query")
 		return err
 	}
 
 	log.WithField("query", query).Debug("executing...")
 	_, err = s.Exec(query)
-	if AuthenticationExpirationErr(err) {
-		log.WithError(err).Warn("authentication has expired, will reload the Snowflake store")
-		s.ReestablishConnection(ctx)
-	}
-
 	return err
 }
 
 func (s *Store) ReestablishConnection(ctx context.Context) {
+	if s.testDB {
+		// Don't actually re-establish for tests.
+		return
+	}
+
 	cfg := &gosnowflake.Config{
 		Account:   config.GetSettings().Config.Snowflake.AccountID,
 		User:      config.GetSettings().Config.Snowflake.Username,
@@ -132,6 +143,7 @@ func LoadSnowflake(ctx context.Context, _store *db.Store) *Store {
 	if _store != nil {
 		// Used for tests.
 		return &Store{
+			testDB:    true,
 			Store:     *_store,
 			configMap: &types.DwhToTablesConfigMap{},
 		}
diff --git a/clients/snowflake/snowflake_test.go b/clients/snowflake/snowflake_test.go
index e44cf8e25..74eeaaa42 100644
--- a/clients/snowflake/snowflake_test.go
+++ b/clients/snowflake/snowflake_test.go
@@ -58,6 +58,52 @@ func (s *SnowflakeTestSuite) TestExecuteMergeNilEdgeCase() {
 	assert.NoError(s.T(), err)
 }
 
+func (s *SnowflakeTestSuite) TestExecuteMergeReestablishAuth() {
+	columns := map[string]typing.KindDetails{
+		"id":                         typing.Integer,
+		"name":                       typing.String,
+		constants.DeleteColumnMarker: typing.Boolean,
+		// Add kindDetails to created_at
+		"created_at": typing.ParseValue(time.Now().Format(time.RFC3339Nano)),
+	}
+
+	rowsData := make(map[string]map[string]interface{})
+
+	for i := 0; i < 5; i++ {
+		rowsData[fmt.Sprintf("pk-%d", i)] = map[string]interface{}{
+			"id":         fmt.Sprintf("pk-%d", i),
+			"created_at": time.Now().Format(time.RFC3339Nano),
+			"name":       fmt.Sprintf("Robin-%d", i),
+		}
+	}
+
+	topicConfig := kafkalib.TopicConfig{
+		Database:  "customer",
+		TableName: "orders",
+		Schema:    "public",
+	}
+
+	tableData := &optimization.TableData{
+		InMemoryColumns: columns,
+		RowsData:        rowsData,
+		TopicConfig:     topicConfig,
+		PrimaryKey:      "id",
+		Rows:            1,
+	}
+
+	s.store.configMap.AddTableToConfig(topicConfig.ToFqName(constants.Snowflake),
+		types.NewDwhTableConfig(columns, nil, false, true))
+
+	s.fakeStore.ExecReturnsOnCall(0, nil, fmt.Errorf("390114: Authentication token has expired. The user must authenticate again."))
+	err := s.store.Merge(context.Background(), tableData)
+	assert.True(s.T(), AuthenticationExpirationErr(err), err)
+
+	s.fakeStore.ExecReturnsOnCall(1, nil, nil)
+	assert.Nil(s.T(), s.store.Merge(context.Background(), tableData))
+	s.fakeStore.ExecReturns(nil, nil)
+	assert.Equal(s.T(), s.fakeStore.ExecCallCount(), 2, "called merge")
+}
+
 func (s *SnowflakeTestSuite) TestExecuteMerge() {
 	columns := map[string]typing.KindDetails{
 		"id":                         typing.Integer,