diff --git a/src/it/test_config.rs b/src/it/test_config.rs
index a5e7adf9..41a6a4cc 100644
--- a/src/it/test_config.rs
+++ b/src/it/test_config.rs
@@ -16,7 +16,7 @@ use {
         },
         input::{InputDevice, Seat},
         keyboard::{Keymap, ModifiedKeySym},
-        video::Connector,
+        video::{Connector, Transform},
         Axis, Direction,
     },
     std::{cell::Cell, ops::Deref, ptr, rc::Rc},
@@ -260,6 +260,13 @@ impl TestConfig {
             scale,
         })
     }
+
+    pub fn set_output_transform(&self, output: &OutputNode, transform: Transform) -> TestResult {
+        self.send(ClientMessage::ConnectorSetTransform {
+            connector: Connector(output.global.connector.connector.id().raw() as _),
+            transform,
+        })
+    }
 }
 
 impl Drop for TestConfig {
diff --git a/src/it/test_ifs/test_compositor.rs b/src/it/test_ifs/test_compositor.rs
index 5c6162c6..1c9076b5 100644
--- a/src/it/test_ifs/test_compositor.rs
+++ b/src/it/test_ifs/test_compositor.rs
@@ -35,6 +35,7 @@ impl TestCompositor {
             server,
             destroyed: Cell::new(false),
             preferred_buffer_scale: Rc::new(Default::default()),
+            preferred_buffer_transform: Rc::new(Default::default()),
         });
         self.tran.add_obj(surface.clone())?;
         Ok(surface)
diff --git a/src/it/test_ifs/test_surface.rs b/src/it/test_ifs/test_surface.rs
index 72c27524..e95f6d50 100644
--- a/src/it/test_ifs/test_surface.rs
+++ b/src/it/test_ifs/test_surface.rs
@@ -17,6 +17,7 @@ pub struct TestSurface {
     pub server: Rc<WlSurface>,
     pub destroyed: Cell<bool>,
     pub preferred_buffer_scale: TEEH<i32>,
+    pub preferred_buffer_transform: TEEH<u32>,
 }
 
 impl TestSurface {
@@ -66,6 +67,15 @@ impl TestSurface {
         self.preferred_buffer_scale.push(ev.factor);
         Ok(())
     }
+
+    fn handle_preferred_buffer_transform(
+        &self,
+        parser: MsgParser<'_, '_>,
+    ) -> Result<(), TestError> {
+        let ev = PreferredBufferTransform::parse_full(parser)?;
+        self.preferred_buffer_transform.push(ev.transform);
+        Ok(())
+    }
 }
 
 impl Drop for TestSurface {
@@ -80,6 +90,7 @@ test_object! {
     ENTER => handle_enter,
     LEAVE => handle_leave,
     PREFERRED_BUFFER_SCALE => handle_preferred_buffer_scale,
+    PREFERRED_BUFFER_TRANSFORM => handle_preferred_buffer_transform,
 }
 
 impl TestObject for TestSurface {}
diff --git a/src/it/tests.rs b/src/it/tests.rs
index 566218ae..8af439d5 100644
--- a/src/it/tests.rs
+++ b/src/it/tests.rs
@@ -56,6 +56,7 @@ mod t0022_toplevel_suspended;
 mod t0023_xdg_activation;
 mod t0024_foreign_toplevel_list;
 mod t0025_dnd_focus_change;
+mod t0026_output_transform;
 
 pub trait TestCase: Sync {
     fn name(&self) -> &'static str;
@@ -100,5 +101,6 @@ pub fn tests() -> Vec<&'static dyn TestCase> {
         t0023_xdg_activation,
         t0024_foreign_toplevel_list,
         t0025_dnd_focus_change,
+        t0026_output_transform,
     }
 }
diff --git a/src/it/tests/t0026_output_transform.rs b/src/it/tests/t0026_output_transform.rs
new file mode 100644
index 00000000..d99afba1
--- /dev/null
+++ b/src/it/tests/t0026_output_transform.rs
@@ -0,0 +1,27 @@
+use {
+    crate::it::{test_error::TestResult, testrun::TestRun},
+    jay_config::video::Transform,
+    std::rc::Rc,
+};
+
+testcase!();
+
+async fn test(run: Rc<TestRun>) -> TestResult {
+    let ds = run.create_default_setup().await?;
+
+    run.cfg
+        .set_output_transform(&ds.output, Transform::FlipRotate90)?;
+
+    let client = run.create_client().await?;
+    let win = client.create_window().await?;
+
+    let transform = win.surface.preferred_buffer_transform.expect()?;
+
+    win.map2().await?;
+
+    tassert_eq!(transform.next()?, 5);
+
+    client.compare_screenshot("1", false).await?;
+
+    Ok(())
+}
diff --git a/src/it/tests/t0026_output_transform/screenshot_1.qoi b/src/it/tests/t0026_output_transform/screenshot_1.qoi
new file mode 100644
index 00000000..2206fc85
Binary files /dev/null and b/src/it/tests/t0026_output_transform/screenshot_1.qoi differ