diff --git a/go/test/endtoend/onlineddl/vrepl_suite/onlineddl_vrepl_suite_test.go b/go/test/endtoend/onlineddl/vrepl_suite/onlineddl_vrepl_suite_test.go
index 56818069e05..53e0512d5d8 100644
--- a/go/test/endtoend/onlineddl/vrepl_suite/onlineddl_vrepl_suite_test.go
+++ b/go/test/endtoend/onlineddl/vrepl_suite/onlineddl_vrepl_suite_test.go
@@ -59,7 +59,7 @@ var (
 )
 
 const (
-	testDataPath = "testdata"
+	testDataPath = "tmptestdata"
 )
 
 func TestMain(m *testing.M) {
diff --git a/go/test/endtoend/onlineddl/vrepl_suite/testdata/fk-child-modify-not-null/alter b/go/test/endtoend/onlineddl/vrepl_suite/testdata/fk-child-modify-not-null/alter
new file mode 100644
index 00000000000..0660453e839
--- /dev/null
+++ b/go/test/endtoend/onlineddl/vrepl_suite/testdata/fk-child-modify-not-null/alter
@@ -0,0 +1 @@
+modify parent_id int not null
diff --git a/go/test/endtoend/onlineddl/vrepl_suite/testdata/fk-child-modify-not-null/create.sql b/go/test/endtoend/onlineddl/vrepl_suite/testdata/fk-child-modify-not-null/create.sql
new file mode 100644
index 00000000000..a94abfdf6de
--- /dev/null
+++ b/go/test/endtoend/onlineddl/vrepl_suite/testdata/fk-child-modify-not-null/create.sql
@@ -0,0 +1,17 @@
+set session foreign_key_checks=0;
+drop table if exists onlineddl_test_child;
+drop table if exists onlineddl_test;
+drop table if exists onlineddl_test_parent;
+set session foreign_key_checks=1;
+create table onlineddl_test_parent (
+  id int auto_increment,
+  ts timestamp,
+  primary key(id)
+);
+create table onlineddl_test (
+  id int auto_increment,
+  i int not null,
+  parent_id int null,
+  primary key(id),
+  constraint test_fk foreign key (parent_id) references onlineddl_test_parent (id) on delete no action
+) auto_increment=1;
diff --git a/go/test/endtoend/onlineddl/vrepl_suite/testdata/fk-child-modify-not-null/ddl_strategy b/go/test/endtoend/onlineddl/vrepl_suite/testdata/fk-child-modify-not-null/ddl_strategy
new file mode 100644
index 00000000000..f48a3989618
--- /dev/null
+++ b/go/test/endtoend/onlineddl/vrepl_suite/testdata/fk-child-modify-not-null/ddl_strategy
@@ -0,0 +1 @@
+--unsafe-allow-foreign-keys
\ No newline at end of file