diff --git a/Sources/Nodes/Core/AbstractBuilder.swift b/Sources/Nodes/Core/AbstractBuilder.swift
index fbe7f0692..c8babee22 100644
--- a/Sources/Nodes/Core/AbstractBuilder.swift
+++ b/Sources/Nodes/Core/AbstractBuilder.swift
@@ -87,7 +87,7 @@ open class AbstractBuilder<ComponentType,
     ) -> BuildType {
         let component: ComponentType = componentFactory(dynamicComponentDependency)
         let newComponent: AnyObject = component as AnyObject
-        assert(newComponent !== lastComponent, "Factory must produce a new component each time it is called")
+        assert(newComponent !== lastComponent, "Factory must produce a new component each time it is called.")
         lastComponent = newComponent
         return build(component: component, dynamicBuildDependency: dynamicBuildDependency)
     }
diff --git a/Sources/Nodes/Core/Config/Plugin.swift b/Sources/Nodes/Core/Config/Plugin.swift
index 32e3e4bad..b0cd22367 100644
--- a/Sources/Nodes/Core/Config/Plugin.swift
+++ b/Sources/Nodes/Core/Config/Plugin.swift
@@ -99,7 +99,7 @@ open class Plugin<ComponentType, BuildType, StateType> {
     private func makeComponent() -> ComponentType {
         let component: ComponentType = componentFactory()
         let newComponent: AnyObject = component as AnyObject
-        assert(newComponent !== lastComponent, "Factory must produce a new component each time it is called")
+        assert(newComponent !== lastComponent, "Factory must produce a new component each time it is called.")
         lastComponent = newComponent
         return component
     }
diff --git a/Sources/Nodes/Core/Config/PluginList.swift b/Sources/Nodes/Core/Config/PluginList.swift
index 3038a29e7..80c78b1ed 100644
--- a/Sources/Nodes/Core/Config/PluginList.swift
+++ b/Sources/Nodes/Core/Config/PluginList.swift
@@ -167,7 +167,7 @@ open class PluginList<KeyType: Hashable, ComponentType, BuildType, StateType> {
     fileprivate func makeComponent() -> ComponentType {
         let component: ComponentType = componentFactory()
         let newComponent: AnyObject = component as AnyObject
-        assert(newComponent !== lastComponent, "Factory must produce a new component each time it is called")
+        assert(newComponent !== lastComponent, "Factory must produce a new component each time it is called.")
         lastComponent = newComponent
         return component
     }
@@ -204,7 +204,7 @@ open class PluginList<KeyType: Hashable, ComponentType, BuildType, StateType> {
         let keys: [KeyType] = creationOrder(component: component, state: state)
         var store: Set<KeyType> = []
         let uniqueKeys: [KeyType] = keys.filter { store.insert($0).inserted }
-        assert(uniqueKeys.count == keys.count, "Keys must be unique \(keys)")
+        assert(uniqueKeys.count == keys.count, "Keys must be unique: \(keys)")
         return uniqueKeys.compactMap { key in plugins.first { $0.key == key } }
     }
 }