diff --git a/spec/lib/pafs_core/data_migration/add_rfcc_codes_spec.rb b/spec/lib/pafs_core/data_migration/add_rfcc_codes_spec.rb
new file mode 100644
index 00000000..20d18f24
--- /dev/null
+++ b/spec/lib/pafs_core/data_migration/add_rfcc_codes_spec.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe PafsCore::DataMigration::AddRfccCodes do
+
+  describe "#up" do
+    it "updates RFCC codes for PSO records" do
+      pso = build(:pso_area, name: "PSO Berkshire and Buckinghamshire", sub_type: nil)
+      pso.save!(validate: false)
+
+      described_class.up
+      expect(pso.reload.sub_type).to eq("TH")
+    end
+  end
+
+  describe "#down" do
+    it "removes RFCC codes from PSOuthorities records" do
+      pso = create(:pso_area, name: "PSO Berkshire and Buckinghamshire", sub_type: "TH")
+      described_class.down
+      expect(pso.reload.sub_type).to eq("TH")
+    end
+  end
+end
diff --git a/spec/lib/pafs_core/data_migration/update_authorities_spec.rb b/spec/lib/pafs_core/data_migration/update_authorities_spec.rb
new file mode 100644
index 00000000..d03420de
--- /dev/null
+++ b/spec/lib/pafs_core/data_migration/update_authorities_spec.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe PafsCore::DataMigration::UpdateAuthorities do
+
+  describe "#up" do
+    it "adds authorities records if not present" do
+      expect(PafsCore::Area.authorities.count).to eq(0)
+      described_class.up
+      expect(PafsCore::Area.authorities.count).to eq(7)
+    end
+
+    it "adds missing authorities records" do
+      create(:authority, name: "Environment Agency", identifier: "EA")
+      expect(PafsCore::Area.authorities.count).to eq(1)
+      described_class.up
+      expect(PafsCore::Area.authorities.count).to eq(7)
+    end
+  end
+
+  describe "#down" do
+    it "removes authorities records" do
+      create(:authority, name: "Environment Agency", identifier: "EA")
+      described_class.down
+      expect(PafsCore::Area.authorities.count).to eq(0)
+    end
+  end
+end