diff --git a/package/yast2-registration.changes b/package/yast2-registration.changes
index cb0e2376..4f553983 100644
--- a/package/yast2-registration.changes
+++ b/package/yast2-registration.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Wed Nov 22 12:41:01 UTC 2023 - Stefan Hundhammer <shundhammer@suse.com>
+
+- Adapted to SCC API change 'base' -> 'isbase' (bsc#1217317):
+  Cherry-picked igonzalezsosa's commit 431d937b78c209c0d35
+- 4.3.28
+
 -------------------------------------------------------------------
 Wed Aug  2 08:44:51 UTC 2023 - Ladislav Slezák <lslezak@suse.com>
 
diff --git a/package/yast2-registration.spec b/package/yast2-registration.spec
index 356bcc6e..5e2ef167 100644
--- a/package/yast2-registration.spec
+++ b/package/yast2-registration.spec
@@ -17,7 +17,7 @@
 
 
 Name:           yast2-registration
-Version:        4.3.27
+Version:        4.3.28
 Release:        0
 Summary:        YaST2 - Registration Module
 License:        GPL-2.0-only
diff --git a/src/lib/registration/ui/migration_repos_workflow.rb b/src/lib/registration/ui/migration_repos_workflow.rb
index 271a3ce2..7a521b1d 100644
--- a/src/lib/registration/ui/migration_repos_workflow.rb
+++ b/src/lib/registration/ui/migration_repos_workflow.rb
@@ -561,7 +561,7 @@ def store_repos_state
 
       # update the $releasever
       def update_releasever
-        new_base = selected_migration.find(&:base)
+        new_base = selected_migration.find(&:isbase)
 
         if new_base
           log.info "Activating new $releasever for base product: #{new_base}"
diff --git a/src/lib/registration/ui/migration_selection_dialog.rb b/src/lib/registration/ui/migration_selection_dialog.rb
index a26fcbbc..d5031b18 100644
--- a/src/lib/registration/ui/migration_selection_dialog.rb
+++ b/src/lib/registration/ui/migration_selection_dialog.rb
@@ -181,7 +181,7 @@ def migration_items
 
       # @return [String] textual representation of base product living in arr
       def base_product_text_for(arr)
-        base_product = arr.find(&:base)
+        base_product = arr.find(&:isbase)
         base_product.friendly_name || base_product.short_name ||
           (base_product.identifier + "-" + base_product.version)
       end
diff --git a/test/fixtures/migration_sles15_offline_migrations.yml b/test/fixtures/migration_sles15_offline_migrations.yml
index 91b473e2..02802a75 100644
--- a/test/fixtures/migration_sles15_offline_migrations.yml
+++ b/test/fixtures/migration_sles15_offline_migrations.yml
@@ -7,7 +7,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: true
+      :isbase: true
       :product_type: base
       :free: false
       :release_stage: beta
@@ -19,7 +19,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: false
+      :isbase: false
       :product_type: module
       :free: true
       :release_stage: released
@@ -31,7 +31,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: false
+      :isbase: false
       :product_type: module
       :free: true
       :release_stage: released
@@ -43,7 +43,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: false
+      :isbase: false
       :product_type: module
       :free: true
       :release_stage: released
@@ -55,7 +55,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: false
+      :isbase: false
       :product_type: module
       :free: true
       :release_stage: released
@@ -67,7 +67,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: false
+      :isbase: false
       :product_type: module
       :free: true
       :release_stage: released
@@ -79,7 +79,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: false
+      :isbase: false
       :product_type: module
       :free: true
       :release_stage: released
@@ -91,7 +91,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: false
+      :isbase: false
       :product_type: module
       :free: true
       :release_stage: released
@@ -103,7 +103,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: false
+      :isbase: false
       :product_type: module
       :free: true
       :release_stage: released
@@ -115,7 +115,7 @@
       :version: '15'
       :arch: x86_64
       :release_type: 
-      :base: false
+      :isbase: false
       :product_type: module
       :free: true
       :release_stage: released
diff --git a/test/fixtures/migration_to_sles12_sp1.yml b/test/fixtures/migration_to_sles12_sp1.yml
index 07001c65..df7d272f 100644
--- a/test/fixtures/migration_to_sles12_sp1.yml
+++ b/test/fixtures/migration_to_sles12_sp1.yml
@@ -7,5 +7,5 @@
       :release_type: 
       :friendly_name: SUSE Linux Enterprise Server SP1 x86_64
       :shortname: SLES12-SP1
-      :base: true
+      :isbase: true
       :product_type: base
diff --git a/test/url_helpers_spec.rb b/test/url_helpers_spec.rb
index 96fb1bc4..0302b1a0 100644
--- a/test/url_helpers_spec.rb
+++ b/test/url_helpers_spec.rb
@@ -152,6 +152,7 @@
 
       context "when the system has been already registered with RMT server" do
         before do
+          allow(File).to receive(:exist?).and_call_original
           allow(File).to receive(:exist?)
             .with("/mnt/etc/SUSEConnect").and_return(true)
         end