diff --git a/.cirrus.yml b/.cirrus.yml
index 768443c3b6..c55dc27661 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -4,68 +4,50 @@ jvm_highcore_task:
     cpu: 4
     memory: 8G
   matrix:
-    - name: JVM high-core-count 2.12
-      script: sbt '++ 2.12' testsJVM/test
     - name: JVM high-core-count 2.13
-      script: sbt '++ 2.13' testsJVM/test stressTests/Jcstress/run
+      script: sbt '++ 2.13' testsJVM/test
     - name: JVM high-core-count 3
       script: sbt '++ 3' testsJVM/test
 
-# jvm_arm_highcore_task:
-#   arm_container:
-#     image: sbtscala/scala-sbt:eclipse-temurin-jammy-17.0.5_8_1.9.0_3.3.0
-#     cpu: 4
-#     memory: 8G
-#   matrix:
-#     - name: JVM ARM high-core-count 2.12
-#       script: sbt '++ 2.12' testsJVM/test
-#     - name: JVM ARM high-core-count 2.13
-#       script: sbt '++ 2.13' testsJVM/test stressTests/Jcstress/run
-#     - name: JVM ARM high-core-count 3
-#       script: sbt '++ 3' testsJVM/test
+jvm_arm_highcore_task:
+  arm_container:
+    image: sbtscala/scala-sbt:eclipse-temurin-jammy-17.0.5_8_1.9.0_3.3.0
+    cpu: 4
+    memory: 8G
+  matrix:
+    - name: JVM ARM high-core-count 2.13
+      script: sbt '++ 2.13' testsJVM/test
+    - name: JVM ARM high-core-count 3
+      script: sbt '++ 3' testsJVM/test
 
 jvm_macos_highcore_task:
   macos_instance:
     image: ghcr.io/cirruslabs/macos-ventura-base:latest
-    cpu: 4
-    memory: 8G
   matrix:
-    - name: JVM Apple Silicon high-core-count 2.12
-      script: 
-        - brew install sbt
-        - sbt '++ 2.12' testsJVM/test
     - name: JVM Apple Silicon high-core-count 2.13
       script:
         - brew install sbt
-        - sbt '++ 2.13' testsJVM/test stressTests/Jcstress/run
+        - sbt '++ 2.13' testsJVM/test
     - name: JVM Apple Silicon high-core-count 3
       script:
         - brew install sbt
         - sbt '++ 3' testsJVM/test
 
-# native_arm_task:
-#   arm_container:
-#     dockerfile: .cirrus/Dockerfile
-#     cpu: 2
-#     memory: 8G
-#   matrix:
-#     - name: Native ARM 2.12
-#       script: sbt '++ 2.12' testsNative/test
-#     - name: Native ARM 2.13
-#       script: sbt '++ 2.13' testsNative/test
-#     - name: Native ARM 3
-#       script: sbt '++ 3' testsNative/test
+native_arm_task:
+  arm_container:
+    dockerfile: .cirrus/Dockerfile
+    cpu: 2
+    memory: 8G
+  matrix:
+    - name: Native ARM 2.13
+      script: sbt '++ 2.13' testsNative/test
+    - name: Native ARM 3
+      script: sbt '++ 3' testsNative/test
 
 native_macos_task:
   macos_instance:
     image: ghcr.io/cirruslabs/macos-ventura-base:latest
-    cpu: 2
-    memory: 8G
   matrix:
-    - name: Native Apple Silicon 2.12
-      script: 
-        - brew install sbt
-        - sbt '++ 2.12' testsNative/test
     - name: Native Apple Silicon 2.13
       script:
         - brew install sbt