diff --git a/packages/server/src/api/routes/tests/row.spec.ts b/packages/server/src/api/routes/tests/row.spec.ts
index 0ad5439653..0752d38f17 100644
--- a/packages/server/src/api/routes/tests/row.spec.ts
+++ b/packages/server/src/api/routes/tests/row.spec.ts
@@ -3496,18 +3496,18 @@ if (descriptions.length) {
         })
       })
 
-      !isInternal &&
+      if (!isInternal) {
         describe("bigint ids", () => {
-          let table: Table
-          let relatedTable: Table
+          let table: Table, relatedTable: Table
+          let tableName: string, relatedTableName: string
 
           beforeAll(async () => {
-            const tableName = generator.guid().substring(0, 10)
+            tableName = generator.guid().substring(0, 10)
             await client!.schema.createTable(tableName, table => {
               table.bigIncrements("id").primary()
             })
 
-            const relatedTableName = generator.guid().substring(0, 10)
+            relatedTableName = generator.guid().substring(0, 10)
             await client!.schema.createTable(relatedTableName, table => {
               table.increments("id").primary()
               table
@@ -3525,17 +3525,16 @@ if (descriptions.length) {
             table = tables.find(t => t.name === tableName)!
             relatedTable = tables.find(t => t.name === relatedTableName)!
 
-            await config.api.table.save({
-              ...table,
-              schema: {
-                ...table.schema,
-                related: {
-                  name: "related",
-                  type: FieldType.LINK,
-                  tableId: relatedTable._id!,
-                  fieldName: "tableid",
-                  relationshipType: RelationshipType.ONE_TO_MANY,
-                },
+            await config.api.datasource.addExistingRelationship({
+              one: {
+                tableId: relatedTable._id!,
+                relationshipName: "one",
+                foreignKey: "tableid",
+              },
+              many: {
+                tableId: table._id!,
+                relationshipName: "many",
+                primaryKey: "id",
               },
             })
           })
@@ -3560,6 +3559,7 @@ if (descriptions.length) {
             ])
           })
         })
+      }
     }
   )
 }
diff --git a/packages/server/src/tests/utilities/api/datasource.ts b/packages/server/src/tests/utilities/api/datasource.ts
index 67484a688a..87f03c8a6f 100644
--- a/packages/server/src/tests/utilities/api/datasource.ts
+++ b/packages/server/src/tests/utilities/api/datasource.ts
@@ -1,14 +1,17 @@
 import {
-  Datasource,
-  VerifyDatasourceRequest,
-  CreateDatasourceResponse,
-  UpdateDatasourceResponse,
-  UpdateDatasourceRequest,
-  QueryJson,
   BuildSchemaFromSourceResponse,
+  CreateDatasourceResponse,
+  Datasource,
   FetchDatasourceInfoResponse,
+  FieldType,
+  QueryJson,
+  RelationshipType,
+  UpdateDatasourceRequest,
+  UpdateDatasourceResponse,
+  VerifyDatasourceRequest,
 } from "@budibase/types"
 import { Expectations, TestAPI } from "./base"
+import { sql } from "@budibase/backend-core"
 
 export class DatasourceAPI extends TestAPI {
   create = async (
@@ -103,4 +106,50 @@ export class DatasourceAPI extends TestAPI {
       }
     )
   }
+
+  addExistingRelationship = async (
+    {
+      one,
+      many,
+    }: {
+      one: { tableId: string; relationshipName: string; foreignKey: string }
+      many: { tableId: string; relationshipName: string; primaryKey: string }
+    },
+    expectations?: Expectations
+  ) => {
+    const oneTableInfo = sql.utils.breakExternalTableId(one.tableId),
+      manyTableInfo = sql.utils.breakExternalTableId(many.tableId)
+    if (oneTableInfo.datasourceId !== manyTableInfo.datasourceId) {
+      throw new Error(
+        "Tables are in different datasources, cannot create relationship."
+      )
+    }
+    const datasource = await this.get(oneTableInfo.datasourceId)
+    const oneTable = datasource.entities?.[oneTableInfo.tableName],
+      manyTable = datasource.entities?.[manyTableInfo.tableName]
+    if (!oneTable || !manyTable) {
+      throw new Error(
+        "Both tables not found in datasource, cannot create relationship."
+      )
+    }
+
+    manyTable.schema[many.relationshipName] = {
+      type: FieldType.LINK,
+      name: many.relationshipName,
+      tableId: oneTable._id!,
+      relationshipType: RelationshipType.MANY_TO_ONE,
+      fieldName: one.foreignKey,
+      foreignKey: many.primaryKey,
+      main: true,
+    }
+    oneTable.schema[one.relationshipName] = {
+      type: FieldType.LINK,
+      name: one.relationshipName,
+      tableId: manyTable._id!,
+      relationshipType: RelationshipType.ONE_TO_MANY,
+      fieldName: many.primaryKey,
+      foreignKey: one.foreignKey,
+    }
+    return await this.update(datasource, expectations)
+  }
 }