diff --git a/.github/workflows/specs.yml b/.github/workflows/specs.yml
index 00d5dc9..2233116 100644
--- a/.github/workflows/specs.yml
+++ b/.github/workflows/specs.yml
@@ -32,6 +32,8 @@ jobs:
             gemfile: 'activemodel-7'
           - ruby-version: 'jruby-9.4.7.0'
             gemfile: 'activemodel-5'
+          - ruby-version: 'jruby-9.4.7.0'
+            gemfile: 'activemodel-8'
           - ruby-version: '2.6'
             gemfile: 'activemodel-8'
           - ruby-version: '2.7'