diff --git a/PHP Monitor.xcodeproj/xcshareddata/xcschemes/PHP Monitor DEV.xcscheme b/PHP Monitor.xcodeproj/xcshareddata/xcschemes/PHP Monitor DEV.xcscheme
index 8642ae0..b0a4d86 100644
--- a/PHP Monitor.xcodeproj/xcshareddata/xcschemes/PHP Monitor DEV.xcscheme	
+++ b/PHP Monitor.xcodeproj/xcshareddata/xcschemes/PHP Monitor DEV.xcscheme	
@@ -91,7 +91,7 @@
          </CommandLineArgument>
          <CommandLineArgument
             argument = "--configuration:~/.phpmon_fconf_working.json"
-            isEnabled = "NO">
+            isEnabled = "YES">
          </CommandLineArgument>
          <CommandLineArgument
             argument = "--configuration:~/.phpmon_fconf_broken.json"
diff --git a/phpmon/Domain/Integrations/Valet/Domains/FakeValetInteractor.swift b/phpmon/Domain/Integrations/Valet/Domains/FakeValetInteractor.swift
index d661fe1..12acd29 100644
--- a/phpmon/Domain/Integrations/Valet/Domains/FakeValetInteractor.swift
+++ b/phpmon/Domain/Integrations/Valet/Domains/FakeValetInteractor.swift
@@ -28,6 +28,20 @@ class FakeValetInteractor: ValetInteractor {
         }
     }
 
+    override func isolate(site: ValetSite, version: String) async throws {
+        await delay(seconds: delayTime)
+
+        site.isolatedPhpVersion = PhpEnv.shared.cachedPhpInstallations[version]
+        site.evaluateCompatibility()
+    }
+
+    override func unisolate(site: ValetSite) async throws {
+        await delay(seconds: delayTime)
+
+        site.isolatedPhpVersion = nil
+        site.evaluateCompatibility()
+    }
+
     override func remove(proxy: ValetProxy) async throws {
         await delay(seconds: delayTime)
         #warning("A fake proxy scanner needs to be added")
diff --git a/phpmon/Domain/Integrations/Valet/Sites/ValetSite.swift b/phpmon/Domain/Integrations/Valet/Sites/ValetSite.swift
index b21fb3a..9a0f418 100644
--- a/phpmon/Domain/Integrations/Valet/Sites/ValetSite.swift
+++ b/phpmon/Domain/Integrations/Valet/Sites/ValetSite.swift
@@ -135,7 +135,10 @@ class ValetSite: ValetListable {
     public func determineComposerPhpVersion() {
         self.determineComposerInformation()
         self.determineValetPhpFileInfo()
+        self.evaluateCompatibility()
+    }
 
+    public func evaluateCompatibility() {
         if self.composerPhp == "???" {
             return
         }