diff --git a/colibri/src/main/scala/colibri/Observable.scala b/colibri/src/main/scala/colibri/Observable.scala
index cdffb503..5f7aae6c 100644
--- a/colibri/src/main/scala/colibri/Observable.scala
+++ b/colibri/src/main/scala/colibri/Observable.scala
@@ -1680,14 +1680,14 @@ object Observable    {
   }
 
   @inline implicit class BooleanOperations(private val source: Observable[Boolean]) extends AnyVal {
-    @inline def asIf[A](ifTrue: => A, ifFalse: A): Observable[A] = source.map {
+    @inline def toggle[A](ifTrue: => A, ifFalse: A): Observable[A] = source.map {
       case true  => ifTrue
       case false => ifFalse
     }
 
-    @inline def asIf[A: Monoid](ifTrue: => A): Observable[A] = asIf(ifTrue, Monoid[A].empty)
+    @inline def toggle[A: Monoid](ifTrue: => A): Observable[A] = toggle(ifTrue, Monoid[A].empty)
 
-    @inline def not: Observable[Boolean] = source.map(x => !x)
+    @inline def negated: Observable[Boolean] = source.map(x => !x)
   }
 
   @inline implicit class IterableOperations[A](private val source: Observable[Iterable[A]]) extends AnyVal {
diff --git a/reactive/src/test/scala/colibri/ReactiveSpec.scala b/reactive/src/test/scala/colibri/ReactiveSpec.scala
index 6aaf150d..7e1505e4 100644
--- a/reactive/src/test/scala/colibri/ReactiveSpec.scala
+++ b/reactive/src/test/scala/colibri/ReactiveSpec.scala
@@ -612,12 +612,12 @@ class ReactiveSpec extends AsyncFlatSpec with Matchers {
     case class EventB(s: String) extends Event
 
     Owned(SyncIO {
-      val eventVar     = Var[Event](EventA(0))
-      val eventNotAVar = Var[Event](EventB(""))
+      val eventVar: Var[Event]     = Var[Event](EventA(0))
+      val eventNotAVar: Var[Event] = Var[Event](EventB(""))
 
-      val eventAVarOption    = eventVar.prism(GenPrism[Event, EventA])
-      val eventAVarOption2   = eventVar.subType[EventA]
-      val eventNotAVarOption = eventNotAVar.prism(GenPrism[Event, EventA])
+      val eventAVarOption: Option[Var[EventA]]    = eventVar.prism(GenPrism[Event, EventA])
+      val eventAVarOption2: Option[Var[EventA]]   = eventVar.subType[EventA]
+      val eventNotAVarOption: Option[Var[EventA]] = eventNotAVar.prism(GenPrism[Event, EventA])
 
       eventAVarOption.isDefined shouldBe true
       eventAVarOption2.isDefined shouldBe true