diff --git a/src/Illuminate/Database/Eloquent/Builder.php b/src/Illuminate/Database/Eloquent/Builder.php
index 5563b5477a2b..185781580684 100755
--- a/src/Illuminate/Database/Eloquent/Builder.php
+++ b/src/Illuminate/Database/Eloquent/Builder.php
@@ -1454,9 +1454,9 @@ protected function groupWhereSliceForScope(QueryBuilder $query, $whereSlice)
         // Here we'll check if the given subset of where clauses contains any "or"
         // booleans and in this case create a nested where expression. That way
         // we don't add any unnecessary nesting thus keeping the query clean.
-        if ($whereBooleans->contains('or')) {
+        if ($whereBooleans->contains(fn ($logicalOperator) => str_contains($logicalOperator, 'or'))) {
             $query->wheres[] = $this->createNestedWhere(
-                $whereSlice, $whereBooleans->first()
+                $whereSlice, str_replace(' not', '', $whereBooleans->first())
             );
         } else {
             $query->wheres = array_merge($query->wheres, $whereSlice);
diff --git a/tests/Database/DatabaseEloquentLocalScopesTest.php b/tests/Database/DatabaseEloquentLocalScopesTest.php
index 1d71f6f57661..d34a510f1e5f 100644
--- a/tests/Database/DatabaseEloquentLocalScopesTest.php
+++ b/tests/Database/DatabaseEloquentLocalScopesTest.php
@@ -61,6 +61,32 @@ public function testLocalScopesCanChained()
         $this->assertSame('select * from "table" where "active" = ? and "type" = ?', $query->toSql());
         $this->assertEquals([true, 'foo'], $query->getBindings());
     }
+
+    public function testLocalScopeNestingDoesntDoubleFirstWhereClauseNegation()
+    {
+        $model = new EloquentLocalScopesTestModel;
+        $query = $model
+            ->newQuery()
+            ->whereNot('firstWhere', true)
+            ->orWhere('secondWhere', true)
+            ->active();
+
+        $this->assertSame('select * from "table" where (not "firstWhere" = ? or "secondWhere" = ?) and "active" = ?', $query->toSql());
+        $this->assertEquals([true, true, true], $query->getBindings());
+    }
+
+    public function testLocalScopeNestingGroupsOrNotWhereClause()
+    {
+        $model = new EloquentLocalScopesTestModel;
+        $query = $model
+            ->newQuery()
+            ->where('firstWhere', true)
+            ->orWhereNot('secondWhere', true)
+            ->active();
+
+        $this->assertSame('select * from "table" where ("firstWhere" = ? or not "secondWhere" = ?) and "active" = ?', $query->toSql());
+        $this->assertEquals([true, true, true], $query->getBindings());
+    }
 }
 
 class EloquentLocalScopesTestModel extends Model