diff --git a/src/TraitExpressionBuilder.ts b/src/TraitExpressionBuilder.ts
index 47fd088..5aa95e0 100644
--- a/src/TraitExpressionBuilder.ts
+++ b/src/TraitExpressionBuilder.ts
@@ -12,8 +12,10 @@ class TraitExpressionBuilder<
     constructor(private expression: TraitExpression<Super, OwnTraits, AllTraits>) {}
 
     extends<
-        NewSuper extends AbstractClass<any>
-    >(superclass: NewSuper) {
+        Super extends AbstractClass<any>
+    >(
+        superclass: Super
+    ) {
         return new TraitExpressionBuilder(
             new TraitExpression(
                 superclass,
@@ -56,12 +58,12 @@ class TraitExpressionBuilder<
         ]) as SpreadSupertraits<Traits>
     }
 
-    get() {
-        return this.expression as GetTraitExpression<Super, OwnTraits, AllTraits>
+    build() {
+        return this.expression as BuildTraitExpression<Super, OwnTraits, AllTraits>
     }
 
-    then<V>(fn: (expression: ReturnType<typeof this.get>) => V): V {
-        return fn(this.get())
+    then<V>(fn: (expression: ReturnType<typeof this.build>) => V): V {
+        return fn(this.build())
     }
 }
 
@@ -110,7 +112,7 @@ type ImplStaticMembersExtendable<
     ]>
 )
 
-type GetTraitExpression<
+type BuildTraitExpression<
     Superclass extends AbstractClass<{}>,
     OwnTraits  extends Trait<any, any, any>[],
     AllTraits  extends Trait<any, any, any>[],
diff --git a/src/tests.ts b/src/tests.ts
index 6a03f21..c80b6a2 100644
--- a/src/tests.ts
+++ b/src/tests.ts
@@ -48,7 +48,7 @@ class TestSuperclass {
 }
 
 
-const builder = expression
+const exp = expression
     .extends(TestSuperclass)
     .expresses(
         PrintsHelloOnNew,
@@ -56,8 +56,8 @@ const builder = expression
         // Identifiable<number>(),
         StatefulSubscription,
     )
+    .build()
 
-const exp = builder.get()
 type Abs = Implements<typeof exp>
 
 // exp.subtrait(