diff --git a/tests/api.rs b/tests/api.rs
index c93cec3..333e71b 100644
--- a/tests/api.rs
+++ b/tests/api.rs
@@ -2093,3 +2093,57 @@ fn transposition_complex() -> Result<(), StamError> {
     );
     Ok(())
 }
+
+#[test]
+#[cfg(feature = "transpose")]
+fn transpose_over_simple_transposition() -> Result<(), StamError> {
+    let mut store = setup_example_8()?;
+    store.annotate(
+        AnnotationBuilder::new()
+            .with_id("A3")
+            .with_data("mydataset", "species", "homo sapiens")
+            .with_target(SelectorBuilder::textselector(
+                "humanrights",
+                Offset::simple(4, 9),
+            )),
+    )?;
+    let transposition = store.annotation("SimpleTransposition1").or_fail()?;
+    let source = store.annotation("A3").or_fail()?;
+    assert_eq!(
+        source.text_simple(),
+        Some("human"),
+        "sanity check for source annotation"
+    );
+    let config = TransposeConfig {
+        transposition_id: Some("NewTransposition".to_string()),
+        target_side_ids: vec!["A3t".to_string()],
+        ..Default::default()
+    };
+    let targets =
+        store.annotate_from_iter(source.transpose(&transposition, config)?.into_iter())?;
+    assert_eq!(targets.len(), 2);
+    let new_transposition = store.annotation("NewTransposition").or_fail()?;
+    assert_eq!(
+        new_transposition
+            .annotations_in_targets(AnnotationDepth::One)
+            .count(),
+        2,
+        "new transposition must have two target annotations (source annotation and transposed annotation)"
+    );
+    let source = store.annotation("A3").or_fail()?; //reobtain (otherwise borrow checker complains after mutation)
+    let transposed = store.annotation("A3t").or_fail()?;
+    assert_eq!(
+        transposed.text_simple(),
+        source.text_simple(),
+        "transposed annotation must reference same text as source"
+    );
+    let tsel = transposed.textselections().next().unwrap();
+    assert_eq!(
+        tsel.resource().id(),
+        Some("warhol"),
+        "transposed annotation must reference the target resource"
+    );
+    assert_eq!(tsel.begin(), 0, "transposed offset check");
+    assert_eq!(tsel.end(), 5, "transposed offset check");
+    Ok(())
+}
diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index bf2eb59..117a45b 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -567,7 +567,7 @@ pub fn setup_example_7(n: usize) -> Result<AnnotationStore, StamError> {
 
 pub fn setup_example_8() -> Result<AnnotationStore, StamError> {
     //simple transposition
-    let mut store = AnnotationStore::default()
+    let store = AnnotationStore::default()
         .with_id("example8")
         .add(TextResource::from_string(
             "humanrights",
@@ -598,7 +598,7 @@ pub fn setup_example_8() -> Result<AnnotationStore, StamError> {
 pub fn setup_example_8b() -> Result<AnnotationStore, StamError> {
     //complex transposition
 
-    let mut store = AnnotationStore::default()
+    let store = AnnotationStore::default()
         .with_id("example8")
         .add(TextResource::from_string(
             "humanrights",