diff --git a/app/models/package.rb b/app/models/package.rb
index 4d144ced8..cf8253384 100644
--- a/app/models/package.rb
+++ b/app/models/package.rb
@@ -480,10 +480,21 @@ execute all pending package migrations at once
   end
 
   class Migration < ApplicationModel
-    @@root = Rails.root.to_s # rubocop:disable Style/ClassVars
+
+    def self.linked
+      szpm_files = []
+      Dir.chdir(root) do
+        szpm_files = Dir['*.szpm']
+      end
+
+      szpm_files.each do |szpm_file|
+        package = szpm_file.sub('.szpm', '')
+        migrate(package)
+      end
+    end
 
     def self.migrate(package, direction = 'normal')
-      location = "#{@@root}/db/addon/#{package.underscore}"
+      location = "#{root}/db/addon/#{package.underscore}"
 
       return true if !File.exist?(location)
       migrations_done = Package::Migration.where(name: package.underscore)
@@ -523,7 +534,7 @@ execute all pending package migrations at once
           logger.info "NOTICE: down package migration '#{migration}'"
           load "#{location}/#{migration}"
           classname = name.camelcase
-          Kernel.const_get(classname).down
+          classname.constantize.down
           record = Package::Migration.find_by(name: package.underscore, version: version)
           if record
             record.destroy
@@ -536,10 +547,14 @@ execute all pending package migrations at once
           logger.info "NOTICE: up package migration '#{migration}'"
           load "#{location}/#{migration}"
           classname = name.camelcase
-          Kernel.const_get(classname).up
+          classname.constantize.up
           Package::Migration.create(name: package.underscore, version: version)
         end
       }
     end
+
+    def self.root
+      Rails.root
+    end
   end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 1563cc98a..db404e9bf 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -22,6 +22,11 @@ RSpec.configure do |config|
   # Zammad specific helpers
   config.include ZammadHelper
 
+  config.before(:suite) do
+    # make sure that all migrations of linked packages are executed
+    Package::Migration.linked
+  end
+
   # skip Zammad helper functions in the stacktrace to lower noise
   config.backtrace_exclusion_patterns << %r{/spec/spec_helper/}