diff --git a/src/cfengine_cli/format.py b/src/cfengine_cli/format.py
index c571003..a111fce 100644
--- a/src/cfengine_cli/format.py
+++ b/src/cfengine_cli/format.py
@@ -281,18 +281,33 @@ def maybe_split_rval(
 
 def attempt_split_attribute(node: Node, indent: int, line_length: int) -> list[str]:
     """Split an attribute node, wrapping the rval if it's a list or call."""
-    assert len(node.children) == 3
-    lval = node.children[0]
-    arrow = node.children[1]
-    rval = node.children[2]
+    assert len(node.children) >= 3  # lval + arrow + rval + optionally comments
+
+    # Separate comments from the 3 structural children (lval, arrow, rval).
+    # Comments are moved to appear before the attribute.
+    children = []
+    comments = []
+    for child in node.children:
+        if child.type == "comment":
+            comments.append(child)
+        else:
+            children.append(child)
+
+    assert len(children) == 3
+
+    lval = children[0]
+    arrow = children[1]
+    rval = children[2]
+
+    comment_lines = [" " * indent + text(c) for c in comments]
 
     if rval.type == "list" or rval.type == "call":
         prefix = " " * indent + text(lval) + " " + text(arrow) + " "
         offset = len(prefix)
         lines = maybe_split_rval(rval, indent, offset, line_length)
         lines[0] = prefix + lines[0]
-        return lines
-    return [" " * indent + stringify_single_line_node(node)]
+        return comment_lines + lines
+    return comment_lines + [" " * indent + stringify_single_line_node(node)]
 
 
 def stringify(node: Node, indent: int, line_length: int) -> list[str]:
diff --git a/tests/format/004_comments.expected.cf b/tests/format/004_comments.expected.cf
index 9b9e4e2..e8e39cb 100644
--- a/tests/format/004_comments.expected.cf
+++ b/tests/format/004_comments.expected.cf
@@ -34,3 +34,14 @@ bundle agent main
         # Inside promise, next to attributes
         string => "value";
 }
+
+bundle agent check
+{
+  methods:
+    "any"
+      # Verify that the custom failsafe.cf did run and created the
+      # file that we removed earlier.
+      usebundle => dcs_passif_fileexists(
+        "$(sys.inputdir)/failsafe_output.txt", "$(this.promise_filename)"
+      );
+}
diff --git a/tests/format/004_comments.input.cf b/tests/format/004_comments.input.cf
index 93b6b05..8e7341a 100644
--- a/tests/format/004_comments.input.cf
+++ b/tests/format/004_comments.input.cf
@@ -33,3 +33,13 @@ if => "something",
 # Inside promise, next to attributes
 string => "value";
 }
+
+bundle agent check
+{
+  methods:
+    "any" usebundle =>
+        # Verify that the custom failsafe.cf did run and created the
+        # file that we removed earlier.
+        dcs_passif_fileexists("$(sys.inputdir)/failsafe_output.txt",
+                              "$(this.promise_filename)");
+}