diff --git a/service/lib/agama/software/manager.rb b/service/lib/agama/software/manager.rb
index 4ca17754c2..4cdf82d899 100644
--- a/service/lib/agama/software/manager.rb
+++ b/service/lib/agama/software/manager.rb
@@ -510,6 +510,9 @@ def update_repositories(new_product)
         else
           # delete all, the #probe call will add the new repos
           repositories.delete_all
+          # deleting happens only in memory, to really delete the caches we need
+          # to write the repository setup to the disk
+          Yast::Pkg.SourceSaveAll
         end
       end
     end
diff --git a/service/test/agama/software/manager_test.rb b/service/test/agama/software/manager_test.rb
index 487492a50f..a7b9c61da3 100644
--- a/service/test/agama/software/manager_test.rb
+++ b/service/test/agama/software/manager_test.rb
@@ -83,6 +83,7 @@
 
   before do
     allow(Yast::Pkg).to receive(:TargetInitialize)
+    allow(Yast::Pkg).to receive(:SourceSaveAll)
     allow(Yast::Pkg).to receive(:ImportGPGKey)
     # allow glob to work for other calls
     allow(Dir).to receive(:glob).and_call_original