diff --git a/.github/workflows/acceptance_test.yml b/.github/workflows/acceptance_test.yml
index cec9a81..cb91138 100644
--- a/.github/workflows/acceptance_test.yml
+++ b/.github/workflows/acceptance_test.yml
@@ -44,7 +44,7 @@ jobs:
         cat $GITHUB_OUTPUT
 
   acceptance:
-    name: "Acceptance tests (${{matrix.platform}}, ${{matrix.collection}}, ${{matrix.gem_version}})"
+    name: "Acceptance tests (${{matrix.collection.agent_version}})"
     needs:
       - setup_matrix
     if: ${{ needs.setup_matrix.outputs.matrix != '{}' }}
@@ -55,7 +55,7 @@ jobs:
       matrix: ${{fromJson(needs.setup_matrix.outputs.matrix)}}
 
     env:
-      PUPPET_GEM_VERSION: ${{matrix.gem_version}}
+      PUPPET_GEM_VERSION: ${{matrix.collection.gem_version}}
       FACTER_GEM_VERSION: 'https://github.com/puppetlabs/facter#main'  # why is this set?
 
     steps:
@@ -90,7 +90,7 @@ jobs:
     - name: Install Agents and module
       run: |
         # bundle exec rake 'litmus:install_agent'
-        bundle exec rake 'litmus:install_agent[${{ matrix.collection }}]'
+        bundle exec rake 'litmus:install_agent[${{ matrix.collection.agent_version }}]'
         bundle exec rake litmus:install_module
 
     - name: Run integration tests
diff --git a/spec/acceptance/observium_install_spec.rb b/spec/acceptance/observium_install_spec.rb
index e4d89fe..5d4f034 100644
--- a/spec/acceptance/observium_install_spec.rb
+++ b/spec/acceptance/observium_install_spec.rb
@@ -30,7 +30,9 @@ class { 'observium':
       idempotent_apply(pp)
     end
   else 
-    apply_manifest(pp)
+    it 'applies' do
+      apply_manifest(pp)
+    end
   end
 
   describe file('/opt/observium/config.php') do
diff --git a/test_matrix.json b/test_matrix.json
index dff7f4a..3df0627 100644
--- a/test_matrix.json
+++ b/test_matrix.json
@@ -1,13 +1,12 @@
 {
-  "platform": [
-    "centos-stream8"
-  ],
   "collection": [
-    "puppet7",
-    "puppet8"
-  ],
-  "gem_version": [
-    "~> 7.31",
-    "~> 8.7"
+    {
+      "agent_version": "puppet7",
+      "gem_version": "~> 7.31"
+    },
+    {
+      "agent_version": "puppet8",
+      "gem_version": "~> 8.7"
+    }
   ]
 }