diff --git a/.gitignore b/.gitignore
index 74eb164a98..2575eddbbc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,8 +10,6 @@ build/
 .idea/*
 !.idea/codeStyles/
 full/
-debug/
-release/
 app/com.crashlytics.settings.json
 app/session_analytics.tap
 .project
diff --git a/omnipod-dash/src/debug/java/info/nightscout/androidaps/plugins/pump/omnipod/dash/annotations/OpenForTesting.kt b/omnipod-dash/src/debug/java/info/nightscout/androidaps/plugins/pump/omnipod/dash/annotations/OpenForTesting.kt
new file mode 100644
index 0000000000..689d6a467c
--- /dev/null
+++ b/omnipod-dash/src/debug/java/info/nightscout/androidaps/plugins/pump/omnipod/dash/annotations/OpenForTesting.kt
@@ -0,0 +1,15 @@
+package info.nightscout.androidaps.plugins.pump.omnipod.dash.annotations
+
+/**
+ * This is the actual annotation that makes the class open. Don't use it directly, only through [OpenForTesting]
+ * which has a NOOP replacement in production.
+ */
+@Target(AnnotationTarget.ANNOTATION_CLASS)
+annotation class OpenClass
+
+/**
+ * Annotate a class with [OpenForTesting] if it should be extendable for testing.
+ */
+@OpenClass
+@Target(AnnotationTarget.CLASS)
+annotation class OpenForTesting
diff --git a/omnipod-dash/src/release/java/info/nightscout/androidaps/plugins/pump/omnipod/dash/annotations/OpenForTesting.kt b/omnipod-dash/src/release/java/info/nightscout/androidaps/plugins/pump/omnipod/dash/annotations/OpenForTesting.kt
new file mode 100644
index 0000000000..6cf2180e50
--- /dev/null
+++ b/omnipod-dash/src/release/java/info/nightscout/androidaps/plugins/pump/omnipod/dash/annotations/OpenForTesting.kt
@@ -0,0 +1,8 @@
+package info.nightscout.androidaps.plugins.pump.omnipod.dash.annotations
+
+/**
+ * Annotate a class with [OpenForTesting] if it should be extendable for testing.
+ * In production the class remains final.
+ */
+@Target(AnnotationTarget.CLASS)
+annotation class OpenForTesting