diff --git a/Calcium/CalculatorClient.swift b/Calcium/CalculatorClient.swift
index 02237d5..5fe2f44 100644
--- a/Calcium/CalculatorClient.swift
+++ b/Calcium/CalculatorClient.swift
@@ -39,5 +39,5 @@ extension CalculatorClient: TestDependencyKey {
         }
     )
 
-    static let testValue = Self()
+    static let testValue = previewValue
 }