diff --git a/src/compare/diff.rs b/src/compare/diff.rs
index 9550869c..bb65c33d 100644
--- a/src/compare/diff.rs
+++ b/src/compare/diff.rs
@@ -2173,51 +2173,46 @@ fn compare_src_block<'b, 's>(
 }
 
 fn compare_clock<'b, 's>(
-    _source: &'s str,
+    source: &'s str,
     emacs: &'b Token<'s>,
     rust: &'b Clock<'s>,
 ) -> Result<DiffEntry<'b, 's>, Box<dyn std::error::Error>> {
-    let mut child_status = Vec::new();
     let mut this_status = DiffStatus::Good;
+    let mut child_status = Vec::new();
     let mut message = None;
 
-    // Compare value
-    let value = get_property(emacs, ":value")?;
-    match value {
-        Some(e) => {
-            let result = compare_ast_node(_source, e, (&rust.timestamp).into())?;
-            child_status.push(artificial_diff_scope("value", vec![result])?);
-        }
-        None => {
-            this_status = DiffStatus::Bad;
-            message = Some(format!(
-                "Value mismatch (emacs != rust) {:?} != {:?}",
-                value, rust.timestamp
-            ));
-        }
-    }
+    assert_no_children(emacs, &mut this_status, &mut message)?;
 
-    // Compare duration
-    let duration = get_property_quoted_string(emacs, ":duration")?;
-    if duration.as_ref().map(String::as_str) != rust.duration {
-        this_status = DiffStatus::Bad;
-        message = Some(format!(
-            "Duration mismatch (emacs != rust) {:?} != {:?}",
-            duration, rust.duration
-        ));
-    }
-
-    // Compare status
-    let status = get_property_unquoted_atom(emacs, ":status")?;
-    match (status, &rust.status) {
-        (Some("running"), ClockStatus::Running) => {}
-        (Some("closed"), ClockStatus::Closed) => {}
-        _ => {
-            this_status = DiffStatus::Bad;
-            message = Some(format!(
-                "Status mismatch (emacs != rust) {:?} != {:?}",
-                status, rust.status
-            ));
+    for diff in compare_properties!(
+        source,
+        emacs,
+        rust,
+        (
+            EmacsField::Required(":value"),
+            |r| Some(&r.timestamp),
+            compare_property_single_ast_node
+        ),
+        (
+            EmacsField::Required(":duration"),
+            |r| r.duration,
+            compare_property_quoted_string
+        ),
+        (
+            EmacsField::Required(":status"),
+            |r| Some(match r.status {
+                ClockStatus::Running => "running",
+                ClockStatus::Closed => "closed",
+            }),
+            compare_property_unquoted_atom
+        )
+    ) {
+        match diff {
+            ComparePropertiesResult::NoChange => {}
+            ComparePropertiesResult::SelfChange(new_status, new_message) => {
+                this_status = new_status;
+                message = new_message
+            }
+            ComparePropertiesResult::DiffEntry(diff_entry) => child_status.push(diff_entry),
         }
     }