diff --git a/.drone.yml b/.drone.yml
index 7a18e0d6..8cf43aa2 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -164,6 +164,7 @@ steps:
   - make test-mssql
   - TEST_CACHE_ENABLE=true make test-mssql
   - TEST_QUOTE_POLICY=reserved make test-mssql
+  - TEST_MSSQL_DEFAULT_VARCHAR=NVARCHAR TEST_MSSQL_DEFAULT_CHAR=NCHAR make test-mssql
   when:
     event:
     - push
diff --git a/Makefile b/Makefile
index 4cccacd8..ed873883 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,8 @@ TEST_MSSQL_HOST ?= mssql:1433
 TEST_MSSQL_DBNAME ?= gitea
 TEST_MSSQL_USERNAME ?= sa
 TEST_MSSQL_PASSWORD ?= MwantsaSecurePassword1
+TEST_MSSQL_DEFAULT_VARCHAR ?= varchar
+TEST_MSSQL_DEFAULT_CHAR ?= char
 
 TEST_MYSQL_HOST ?= mysql:3306
 TEST_MYSQL_CHARSET ?= utf8
@@ -144,12 +146,14 @@ test-cockroach\#%: go-check
 test-mssql: go-check
 	$(GO) test $(INTEGRATION_PACKAGES) -v -race -db=mssql -cache=$(TEST_CACHE_ENABLE) -quote=$(TEST_QUOTE_POLICY) \
 	-conn_str="server=$(TEST_MSSQL_HOST);user id=$(TEST_MSSQL_USERNAME);password=$(TEST_MSSQL_PASSWORD);database=$(TEST_MSSQL_DBNAME)" \
+	-default_varchar=$(TEST_MSSQL_DEFAULT_VARCHAR) -default_char=$(TEST_MSSQL_DEFAULT_CHAR) \
 	-coverprofile=mssql.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
 
 .PNONY: test-mssql\#%
 test-mssql\#%: go-check
 	$(GO) test $(INTEGRATION_PACKAGES) -v -race -run $* -db=mssql -cache=$(TEST_CACHE_ENABLE) -quote=$(TEST_QUOTE_POLICY) \
 	-conn_str="server=$(TEST_MSSQL_HOST);user id=$(TEST_MSSQL_USERNAME);password=$(TEST_MSSQL_PASSWORD);database=$(TEST_MSSQL_DBNAME)" \
+	-default_varchar=$(TEST_MSSQL_DEFAULT_VARCHAR) -default_char=$(TEST_MSSQL_DEFAULT_CHAR) \
 	-coverprofile=mssql.$(TEST_QUOTE_POLICY).$(TEST_CACHE_ENABLE).coverage.out -covermode=atomic
 
 .PNONY: test-mymysql