Fill in missing deprecation spec

1 files changed, 9 insertions, 1 deletions

diff --git a/spec/other/major_deprecation_spec.rb b/spec/other/major_deprecation_spec.rb
index 5f79a0ce4c..196cdd72a8 100644
--- a/spec/other/major_deprecation_spec.rb
+++ b/spec/other/major_deprecation_spec.rb
@@ -318,7 +318,15 @@ RSpec.describe "major deprecations" do
       )
     end
 
-    pending "fails with a helpful error", :bundler => "3"
+    it "fails with a helpful error", :bundler => "3" do
+      expect(err).to include(
+        "[!] There was an error evaluating `Gemfile`: " \
+        "This Gemfile contains multiple primary sources. " \
+        "Each source after the first must include a block to indicate which gems should come from that source. " \
+        "To downgrade this error to a warning, run `bundle config unset disable_multisource`. " \
+        "Bundler cannot continue."
+      )
+    end
   end
 
   context "when Bundler.setup is run in a ruby script" do