diff --git a/src/main/resources/org/eolang/lints/design/unoptimizable-recursion.xsl b/src/main/resources/org/eolang/lints/design/unoptimizable-recursion.xsl
index 7cab376a3..ddabded37 100644
--- a/src/main/resources/org/eolang/lints/design/unoptimizable-recursion.xsl
+++ b/src/main/resources/org/eolang/lints/design/unoptimizable-recursion.xsl
@@ -92,7 +92,7 @@
       <xsl:for-each select="//o[eo:abstract(.) and @name and not(contains(@name, '🌵')) and o[@name='φ']]">
         <xsl:variable name="name" select="string(@name)"/>
         <xsl:variable name="root" select="o[@name='φ']"/>
-        <xsl:variable name="calls" select=".//o[eo:is-self-call(string(@base), $name) and not(ancestor::o[eo:test-name(@name)])]"/>
+        <xsl:variable name="calls" select=".//o[eo:is-self-call(string(@base), $name) and not(ancestor::o[eo:test-name(@name)]) and ancestor::o[eo:abstract(.)][1] is current()]"/>
         <xsl:variable name="loops" select="($root | $root//o)[eo:is-self-tail(string(@base), $name) and eo:tail(., $root)]"/>
         <xsl:variable name="elsewhere" select="$calls except ($root/descendant-or-self::o)"/>
         <xsl:if test="exists($calls) and empty($loops)">
diff --git a/src/test/resources/org/eolang/lints/packs/single/unoptimizable-recursion/allows-a-nested-method-that-builds-a-new-copy-of-its-owner.yaml b/src/test/resources/org/eolang/lints/packs/single/unoptimizable-recursion/allows-a-nested-method-that-builds-a-new-copy-of-its-owner.yaml
new file mode 100644
index 000000000..4e5597b84
--- /dev/null
+++ b/src/test/resources/org/eolang/lints/packs/single/unoptimizable-recursion/allows-a-nested-method-that-builds-a-new-copy-of-its-owner.yaml
@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2026 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/design/unoptimizable-recursion.xsl
+defects: 0
+input: |
+  [x] > box
+    x > @
+    [y] > plus
+      box y > @