diff --git a/Makefile b/Makefile
index 1521977de..82e454fb8 100644
--- a/Makefile
+++ b/Makefile
@@ -68,6 +68,7 @@ OBJS = src/backend/distributed/shared_library_init.o \
      src/backend/distributed/test/partitioning_utils.o \
      src/backend/distributed/test/progress_utils.o \
      src/backend/distributed/test/prune_shard_list.o \
+     src/backend/distributed/test/sequential_execution.o \
      src/backend/distributed/transaction/backend_data.o \
      src/backend/distributed/transaction/distributed_deadlock_detection.o \
      src/backend/distributed/transaction/lock_graph.o \
diff --git a/src/backend/distributed/executor/multi_executor.c b/src/backend/distributed/executor/multi_executor.c
index 6e4fe0d19..b506ea955 100644
--- a/src/backend/distributed/executor/multi_executor.c
+++ b/src/backend/distributed/executor/multi_executor.c
@@ -48,43 +48,9 @@ int MultiShardConnectionType = PARALLEL_CONNECTION;
 
 
 /* local function forward declarations */
-static void SetLocalMultiShardModifyModeToSequential(void);
 static Relation StubRelation(TupleDesc tupleDescriptor);
 
 
-/* exports for SQL callable functions */
-PG_FUNCTION_INFO_V1(set_local_multi_shard_modify_mode_to_sequential);
-
-
-/*
- * set_local_multi_shard_modify_mode_to_sequential is a SQL
- * interface for testing SetLocalMultiShardModifyModeToSequential().
- */
-Datum
-set_local_multi_shard_modify_mode_to_sequential(PG_FUNCTION_ARGS)
-{
-	SetLocalMultiShardModifyModeToSequential();
-
-	PG_RETURN_VOID();
-}
-
-
-/*
- * SetLocalMultiShardModifyModeToSequential simply a C interface for
- * setting the following:
- *      SET LOCAL citus.multi_shard_modify_mode = 'sequential';
- */
-static void
-SetLocalMultiShardModifyModeToSequential()
-{
-	WarnNoTransactionChain(true, "SET LOCAL");
-
-	set_config_option("citus.multi_shard_modify_mode", "sequential",
-					  (superuser() ? PGC_SUSET : PGC_USERSET), PGC_S_SESSION,
-					  GUC_ACTION_LOCAL, true, 0, false);
-}
-
-
 /*
  * ReturnTupleFromTuplestore reads the next tuple from the tuple store of the
  * given Citus scan node and returns it. It returns null if all tuples are read
@@ -334,3 +300,19 @@ ExecutePlanIntoDestReceiver(PlannedStmt *queryPlan, ParamListInfo params,
 #endif
 	PortalDrop(portal, false);
 }
+
+
+/*
+ * SetLocalMultiShardModifyModeToSequential simply a C interface for
+ * setting the following:
+ *      SET LOCAL citus.multi_shard_modify_mode = 'sequential';
+ */
+void
+SetLocalMultiShardModifyModeToSequential()
+{
+	WarnNoTransactionChain(true, "SET LOCAL");
+
+	set_config_option("citus.multi_shard_modify_mode", "sequential",
+					  (superuser() ? PGC_SUSET : PGC_USERSET), PGC_S_SESSION,
+					  GUC_ACTION_LOCAL, true, 0, false);
+}
diff --git a/src/backend/distributed/test/sequential_execution.c b/src/backend/distributed/test/sequential_execution.c
new file mode 100644
index 000000000..3c4dcab6a
--- /dev/null
+++ b/src/backend/distributed/test/sequential_execution.c
@@ -0,0 +1,33 @@
+/*-------------------------------------------------------------------------
+ *
+ * test/src/sequential_execution.c
+ *
+ * This file contains functions to test setting citus.multi_shard_modify_mode
+ * GUC.
+ *
+ * Copyright (c) 2018, Citus Data, Inc.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#include "postgres.h"
+#include "fmgr.h"
+
+#include "distributed/multi_executor.h"
+
+
+/* exports for SQL callable functions */
+PG_FUNCTION_INFO_V1(set_local_multi_shard_modify_mode_to_sequential);
+
+
+/*
+ * set_local_multi_shard_modify_mode_to_sequential is a SQL
+ * interface for testing SetLocalMultiShardModifyModeToSequential().
+ */
+Datum
+set_local_multi_shard_modify_mode_to_sequential(PG_FUNCTION_ARGS)
+{
+	SetLocalMultiShardModifyModeToSequential();
+
+	PG_RETURN_VOID();
+}
diff --git a/src/include/distributed/multi_executor.h b/src/include/distributed/multi_executor.h
index 58aab1395..17a9586a7 100644
--- a/src/include/distributed/multi_executor.h
+++ b/src/include/distributed/multi_executor.h
@@ -39,6 +39,7 @@ extern void ExecuteQueryIntoDestReceiver(Query *query, ParamListInfo params,
 										 DestReceiver *dest);
 extern void ExecutePlanIntoDestReceiver(PlannedStmt *queryPlan, ParamListInfo params,
 										DestReceiver *dest);
+extern void SetLocalMultiShardModifyModeToSequential(void);
 
 
 #endif /* MULTI_EXECUTOR_H */