--fix-suggestions rewrites this one, and a plain --fix leaves it alone: the correction changes what the stylesheet does, or is one of several the check would accept.

Name compared to a string

name() = 'xsl:message' compares the prefix the source happens to use, so it fails under a different but equivalent namespace binding, and local-name() = 'x' ignores the namespace entirely. Both build a string to ask what a node test asks directly. Match the element on the self axis: self::xsl:message, or self::*:x in XSLT 2.0 and later.

Incorrect:

<xsl:if test="name() = 'xsl:message'">
  <xsl:apply-templates select="*[local-name() = 'label']"/>
</xsl:if>

Correct:

<xsl:if test="self::xsl:message">
  <xsl:apply-templates select="*[self::*:label]"/>
</xsl:if>

Only an equality comparison whose context is an element is reported, and a local-name() one only from XSLT 2.0. Under @*, a processing-instruction(), or a context nothing pins down, the string comparison stays.