diff --git a/annotation/src/test/scala-2.12/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceHelper.scala b/annotation/src/test/scala-2.12/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceHelper.scala
new file mode 100644
index 0000000..13abddb
--- /dev/null
+++ b/annotation/src/test/scala-2.12/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceHelper.scala
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2022 Typelevel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.typelevel.scalaccompat.annotation
+
+object CustomUncheckedVarianceHelper {
+  trait Invariant[A]
+  trait Invariant2[A]
+  trait Invariant212[A]
+  trait Invariant213[+A]
+  trait Invariant3[+A]
+}
diff --git a/annotation/src/test/scala-2.13/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceHelper.scala b/annotation/src/test/scala-2.13/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceHelper.scala
new file mode 100644
index 0000000..abf0a28
--- /dev/null
+++ b/annotation/src/test/scala-2.13/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceHelper.scala
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2022 Typelevel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.typelevel.scalaccompat.annotation
+
+object CustomUncheckedVarianceHelper {
+  trait Invariant[A]
+  trait Invariant2[A]
+  trait Invariant212[+A]
+  trait Invariant213[A]
+  trait Invariant3[+A]
+}
diff --git a/annotation/src/test/scala-3/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceHelper.scala b/annotation/src/test/scala-3/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceHelper.scala
new file mode 100644
index 0000000..c4386d5
--- /dev/null
+++ b/annotation/src/test/scala-3/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceHelper.scala
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2022 Typelevel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.typelevel.scalaccompat.annotation
+
+object CustomUncheckedVarianceHelper {
+  trait Invariant[A]
+  trait Invariant2[+A]
+  trait Invariant212[+A]
+  trait Invariant213[+A]
+  trait Invariant3[A]
+}
diff --git a/annotation/src/test/scala/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceSuite.scala b/annotation/src/test/scala/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceSuite.scala
new file mode 100644
index 0000000..f0188fc
--- /dev/null
+++ b/annotation/src/test/scala/org/typelevel/scalaccompat/annotation/CustomUncheckedVarianceSuite.scala
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2022 Typelevel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.typelevel.scalaccompat.annotation
+
+import CustomUncheckedVarianceHelper._
+
+object CustomUncheckedVarianceSuite {
+
+  class Covariant[+A]    extends Invariant[A @uncheckedVariance]
+  class Covariant2[+A]   extends Invariant2[A @uncheckedVariance2]
+  class Covariant212[+A] extends Invariant212[A @uncheckedVariance212]
+  class Covariant213[+A] extends Invariant213[A @uncheckedVariance213]
+  class Covariant3[+A]   extends Invariant3[A @uncheckedVariance3]
+
+}