diff --git a/lib/versioning/ruby/index.spec.ts b/lib/versioning/ruby/index.spec.ts
index f3a29ebeeaf92bf5e1501823413c6c90223716cf..f93730f93906c4665ea1e815ef47f7e3bad01625 100644
--- a/lib/versioning/ruby/index.spec.ts
+++ b/lib/versioning/ruby/index.spec.ts
@@ -514,6 +514,8 @@ describe('semverRuby', () => {
         ],
         ['~> 6.0.0', '~> 5.2.0', 'replace', '5.2.4.1', '6.0.2.1'],
         ['~> 5.0, < 6', '~> 4.0, < 5', 'replace', '4.7.5', '5.0.0'],
+        ['~> 5.0, < 6', '~> 4.0, < 5', 'replace', '4.7.5', '5.0.1'],
+        ['~> 5.1, < 6', '~> 4.0, < 5', 'replace', '4.7.5', '5.1.0'], // ideally this should be ~> 5.0
       ].forEach(
         ([expected, currentValue, rangeStrategy, fromVersion, toVersion]) => {
           expect(