diff --git a/database/README.md b/database/README.md
index 2ea24d8..04b5cdf 100644
--- a/database/README.md
+++ b/database/README.md
@@ -39,6 +39,6 @@ Follow-up Questions:
 
 ## Exercise 3 mock database
 
-Using your new database interface mock the database functions into your [tests from last week.](../restful-go/ex-4-tests/framework_test.go)
+Using your new database interface mock the database functions into your [tests from last week.](../restful-go/ex-4-tests/framework_test.go). The goal is to imitate db interactions without connecting to the db. You will need to add the DB package to the same repo that your server lives in.
 
-TODO: copy tests from cli-game. and edit the interface to be inside the test suite.
+[Here](https://github.com/Soypete/golang-cli-game/blob/24dc57852dee27bb17120555d3d390bd17a78d13/server/api_test.go#L14) are some working tests that use `passBD{}` and `failDB{}` to mock database functionality in an api test.
diff --git a/database/ex-3-custom-tooling/main.go b/database/ex-3-custom-tooling/main.go
deleted file mode 100644
index e652161..0000000
--- a/database/ex-3-custom-tooling/main.go
+++ /dev/null
@@ -1,50 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"net/url"
-
-	"github.com/jmoiron/sqlx"
-)
-
-type connection interface {
-	GetUserData(string) (string, error)
-	UpsertUsername(string) error
-	DeleteUsername(string) error
-	CreateGame(string) (int64, error)
-	AddUserToGame(string, int64) error
-	GetGameData(int64) (string, error)
-	StopGame(int64) error
-}
-
-type client struct {
-	db *sqlx.DB
-}
-
-func setup() *client {
-	// connect to db
-	params := url.Values{}
-	params.Set("sslmode", "disable")
-
-	connectionString := url.URL{
-		Scheme:   "postgresql",
-		User:     url.UserPassword("postgres", "postgres"),
-		Host:     "localhost:5431",
-		Path:     "postgres",
-		RawQuery: params.Encode(),
-	}
-	db, err := sqlx.Connect("postgres", connectionString.String())
-	if err != nil {
-		panic(err)
-	}
-
-	return &client{
-		db: db,
-	}
-}
-func main() {
-	dbClient := setup()
-
-	fmt.Println(dbClient.db.Ping())
-
-}