diff --git a/src/sscce-sequelize-7.ts b/src/sscce-sequelize-7.ts
index 603cb219c..8a38bb0a3 100644
--- a/src/sscce-sequelize-7.ts
+++ b/src/sscce-sequelize-7.ts
@@ -1,43 +1,251 @@
-import { CreationOptional, DataTypes, InferAttributes, InferCreationAttributes, Model } from '@sequelize/core';
-import { Attribute, NotNull } from '@sequelize/core/decorators-legacy';
-import { createSequelize7Instance } from '../dev/create-sequelize-instance';
-import { expect } from 'chai';
-import sinon from 'sinon';
+import {
+  CreationOptional,
+  DataTypes,
+  InferAttributes,
+  InferCreationAttributes,
+  Model,
+} from "@sequelize/core";
+import { createSequelize7Instance } from "../dev/create-sequelize-instance";
+import { expect } from "chai";
 
 // if your issue is dialect specific, remove the dialects you don't need to test on.
-export const testingOnDialects = new Set(['mssql', 'sqlite', 'mysql', 'mariadb', 'postgres', 'postgres-native']);
+export const testingOnDialects = new Set(["postgres"]);
 
-// You can delete this file if you don't want your SSCCE to be tested against Sequelize 7
+class Location extends Model<
+  InferAttributes<Location>,
+  InferCreationAttributes<Location>
+> {
+  declare id: CreationOptional<number>;
+  declare name: string;
+
+  declare customers?: Customer[];
+  declare systems?: System[];
+}
+
+class Customer extends Model<
+  InferAttributes<Customer>,
+  InferCreationAttributes<Customer>
+> {
+  declare id: CreationOptional<number>;
+  declare name: string;
+
+  declare locations?: Location[];
+}
+
+class System extends Model<
+  InferAttributes<System>,
+  InferCreationAttributes<System>
+> {
+  declare id: CreationOptional<number>;
+  declare name: string;
+  declare locationId: number;
+
+  declare location?: Location;
+  declare fuelDeliveries?: FuelDelivery[];
+}
+
+class FuelDelivery extends Model<
+  InferAttributes<FuelDelivery>,
+  InferCreationAttributes<FuelDelivery>
+> {
+  declare id: CreationOptional<number>;
+  declare product: string;
+  declare systemId: number;
+
+  declare system?: System;
+}
+
+class LocationCustomer extends Model<
+  InferAttributes<LocationCustomer>,
+  InferCreationAttributes<LocationCustomer>
+> {
+  declare locationId: number;
+  declare customerId: number;
+}
 
 // Your SSCCE goes inside this function.
 export async function run() {
   // This function should be used instead of `new Sequelize()`.
   // It applies the config for your SSCCE to work on CI.
   const sequelize = createSequelize7Instance({
-    logQueryParameters: true,
-    benchmark: true,
+    minifyAliases: true,
+    dialect: "postgres",
     define: {
-      // For less clutter in the SSCCE
+      // Keep model definitions lean so the regression focus stays on include resolution.
       timestamps: false,
     },
   });
 
-  class Foo extends Model<InferAttributes<Foo>, InferCreationAttributes<Foo>> {
-    declare id: CreationOptional<number>;
+  Location.init(
+    {
+      id: {
+        type: DataTypes.INTEGER,
+        autoIncrement: true,
+        primaryKey: true,
+      },
+      name: {
+        type: DataTypes.STRING,
+        allowNull: false,
+      },
+    },
+    {
+      sequelize,
+      tableName: "locations",
+    }
+  );
 
-    @Attribute(DataTypes.TEXT)
-    @NotNull
-    declare name: string;
-  }
+  Customer.init(
+    {
+      id: {
+        type: DataTypes.INTEGER,
+        autoIncrement: true,
+        primaryKey: true,
+      },
+      name: {
+        type: DataTypes.STRING,
+        allowNull: false,
+      },
+    },
+    {
+      sequelize,
+      tableName: "customers",
+    }
+  );
 
-  sequelize.addModels([Foo]);
+  System.init(
+    {
+      id: {
+        type: DataTypes.INTEGER,
+        autoIncrement: true,
+        primaryKey: true,
+      },
+      name: {
+        type: DataTypes.STRING,
+        allowNull: false,
+      },
+      locationId: {
+        type: DataTypes.INTEGER,
+        allowNull: false,
+      },
+    },
+    {
+      sequelize,
+      tableName: "systems",
+    }
+  );
+
+  FuelDelivery.init(
+    {
+      id: {
+        type: DataTypes.INTEGER,
+        autoIncrement: true,
+        primaryKey: true,
+      },
+      product: {
+        type: DataTypes.STRING,
+        allowNull: false,
+      },
+      systemId: {
+        type: DataTypes.INTEGER,
+        allowNull: false,
+      },
+    },
+    {
+      sequelize,
+      tableName: "fuel_deliveries",
+    }
+  );
+
+  LocationCustomer.init(
+    {
+      locationId: {
+        type: DataTypes.INTEGER,
+        allowNull: false,
+        primaryKey: true,
+      },
+      customerId: {
+        type: DataTypes.INTEGER,
+        allowNull: false,
+        primaryKey: true,
+      },
+    },
+    {
+      sequelize,
+      tableName: "location_customers",
+    }
+  );
+
+  FuelDelivery.belongsTo(System, { as: "system", foreignKey: "systemId" });
+  System.hasMany(FuelDelivery, {
+    as: "fuelDeliveries",
+    foreignKey: "systemId",
+  });
 
-  // You can use sinon and chai assertions directly in your SSCCE.
-  const spy = sinon.spy();
-  sequelize.afterBulkSync(() => spy());
-  await sequelize.sync({ force: true });
-  expect(spy).to.have.been.called;
+  System.belongsTo(Location, { as: "location", foreignKey: "locationId" });
+  Location.hasMany(System, { as: "systems", foreignKey: "locationId" });
 
-  console.log(await Foo.create({ name: 'TS foo' }));
-  expect(await Foo.count()).to.equal(1);
+  Location.belongsToMany(Customer, {
+    as: "customers",
+    through: LocationCustomer,
+    foreignKey: "locationId",
+    otherKey: "customerId",
+  });
+  Customer.belongsToMany(Location, {
+    as: "locations",
+    through: LocationCustomer,
+    foreignKey: "customerId",
+    otherKey: "locationId",
+  });
+
+  try {
+    await sequelize.sync({ force: true });
+
+    const customer = await Customer.create({ name: "Propane Co-op" });
+    const location = await Location.create({ name: "Rural Depot" });
+    await LocationCustomer.create({
+      customerId: customer.id,
+      locationId: location.id,
+    });
+
+    const system = await System.create({
+      name: "Delivery System Alpha",
+      locationId: location.id,
+    });
+    const delivery = await FuelDelivery.create({
+      product: "Propane",
+      systemId: system.id,
+    });
+
+    const result = await FuelDelivery.findByPk(delivery.id, {
+      logging: console.log,
+      include: [
+        {
+          association: "system",
+          required: true,
+          include: [
+            {
+              association: "location",
+              required: true,
+              include: [
+                {
+                  association: "customers",
+                  required: true,
+                },
+              ],
+            },
+          ],
+        },
+      ],
+    });
+
+    expect(result).to.not.be.null;
+    expect(result!.system).to.not.be.undefined;
+    expect(result!.system!.location).to.not.be.undefined;
+    const customers = result!.system!.location!.customers;
+    expect(customers).to.not.be.undefined;
+    expect(customers).to.have.length(1);
+    expect(customers![0].id).to.equal(customer.id);
+  } finally {
+    await sequelize.close();
+  }
 }