diff --git a/interfaces/05-assertion/book.go b/interfaces/05-type-assertion/book.go
similarity index 100%
rename from interfaces/05-assertion/book.go
rename to interfaces/05-type-assertion/book.go
diff --git a/interfaces/05-assertion/game.go b/interfaces/05-type-assertion/game.go
similarity index 100%
rename from interfaces/05-assertion/game.go
rename to interfaces/05-type-assertion/game.go
diff --git a/interfaces/05-assertion/list.go b/interfaces/05-type-assertion/list.go
similarity index 100%
rename from interfaces/05-assertion/list.go
rename to interfaces/05-type-assertion/list.go
diff --git a/interfaces/05-assertion/main.go b/interfaces/05-type-assertion/main.go
similarity index 100%
rename from interfaces/05-assertion/main.go
rename to interfaces/05-type-assertion/main.go
diff --git a/interfaces/05-assertion/money.go b/interfaces/05-type-assertion/money.go
similarity index 100%
rename from interfaces/05-assertion/money.go
rename to interfaces/05-type-assertion/money.go
diff --git a/interfaces/05-assertion/puzzle.go b/interfaces/05-type-assertion/puzzle.go
similarity index 100%
rename from interfaces/05-assertion/puzzle.go
rename to interfaces/05-type-assertion/puzzle.go
diff --git a/interfaces/05-assertion/toy.go b/interfaces/05-type-assertion/toy.go
similarity index 100%
rename from interfaces/05-assertion/toy.go
rename to interfaces/05-type-assertion/toy.go