diff --git a/CHANGELOG.md b/CHANGELOG.md
index e09ddcd..63de036 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,4 @@
+## [8.0.0-pre-3] - 31.05.2024 releaseInstance will now throw if the instance isn't registered
 ## [8.0.0-pre-2] - 29.05.2024 fixing negitiv reference count
 ## [8.0.0-pre-1] - 26.05.2024 
 * `getAll()` and `getAllAsync()` now have a `fromAllScopes` parameter.
diff --git a/lib/get_it_impl.dart b/lib/get_it_impl.dart
index 648789a..bc7eecc 100644
--- a/lib/get_it_impl.dart
+++ b/lib/get_it_impl.dart
@@ -857,15 +857,13 @@ class _GetItImplementation implements GetIt {
   /// it will immediately unregister and dispose the object
   @override
   void releaseInstance(Object instance) {
-    final registerdFactory = _findFirstFactoryByInstanceOrNull(instance);
-    if (registerdFactory != null) {
-      if (registerdFactory._refenceCount < 1) {
-        assert(registerdFactory._refenceCount == 0,
-            'GetIt: releaseInstance was called on an object that was already released');
-        unregister(instance: instance);
-      } else {
-        registerdFactory._refenceCount--;
-      }
+    final registerdFactory = _findFactoryByInstance(instance);
+    if (registerdFactory._refenceCount < 1) {
+      assert(registerdFactory._refenceCount == 0,
+          'GetIt: releaseInstance was called on an object that was already released');
+      unregister(instance: instance);
+    } else {
+      registerdFactory._refenceCount--;
     }
   }
 
@@ -1087,9 +1085,8 @@ class _GetItImplementation implements GetIt {
       );
 
   _ServiceFactory? _findFirstFactoryByInstanceOrNull(Object instance) {
-    final registeredFactories =
-        _allFactories.where((x) => identical(x.instance, instance));
-    return registeredFactories.isEmpty ? null : registeredFactories.first;
+    return _allFactories
+        .firstWhereOrNull((x) => identical(x.instance, instance));
   }
 
   _ServiceFactory _findFactoryByInstance(Object instance) {
diff --git a/pubspec.yaml b/pubspec.yaml
index 5cfebb2..26bda3e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: get_it
 description: Simple direct Service Locator that allows to decouple the interface from a concrete implementation and  to access the concrete implementation from everywhere in your App"
-version: 8.0.0-pre-2
+version: 8.0.0-pre-3
 maintainer: Thomas Burkhart (@escamoteur)
 homepage: https://github.com/fluttercommunity/get_it
 funding: