diff --git a/pom.xml b/pom.xml
index 110a91f..4073a8e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -106,7 +106,7 @@ SOFTWARE.
     <dependency>
       <groupId>org.eolang</groupId>
       <artifactId>eo-parser</artifactId>
-      <version>0.43.1</version>
+      <version>0.43.2</version>
       <scope>test</scope>
     </dependency>
     <dependency>
diff --git a/src/main/resources/org/eolang/lints/critical/not-empty-atoms.xsl b/src/main/resources/org/eolang/lints/critical/atom-in-atom.xsl
similarity index 71%
rename from src/main/resources/org/eolang/lints/critical/not-empty-atoms.xsl
rename to src/main/resources/org/eolang/lints/critical/atom-in-atom.xsl
index c87d040..ec74377 100644
--- a/src/main/resources/org/eolang/lints/critical/not-empty-atoms.xsl
+++ b/src/main/resources/org/eolang/lints/critical/atom-in-atom.xsl
@@ -22,31 +22,10 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 -->
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="not-empty-atoms" version="2.0">
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="atom-in-atom" version="2.0">
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
-      <xsl:for-each select="//o[@atom and o[@base]]">
-        <xsl:element name="defect">
-          <xsl:attribute name="line">
-            <xsl:value-of select="if (@line) then @line else '0'"/>
-          </xsl:attribute>
-          <xsl:attribute name="severity">
-            <xsl:text>error</xsl:text>
-          </xsl:attribute>
-          <xsl:text>The atom '</xsl:text>
-          <xsl:value-of select="@name"/>
-          <xsl:text>' may not have any attributes: </xsl:text>
-          <xsl:for-each select="o[@base]">
-            <xsl:if test="position() &gt; 1">
-              <xsl:text>, </xsl:text>
-            </xsl:if>
-            <xsl:text>'</xsl:text>
-            <xsl:value-of select="@name"/>
-            <xsl:text>'</xsl:text>
-          </xsl:for-each>
-        </xsl:element>
-      </xsl:for-each>
       <xsl:for-each select="//o[@atom and o[@atom]]">
         <xsl:element name="defect">
           <xsl:attribute name="line">
diff --git a/src/main/resources/org/eolang/lints/critical/not-empty-atom.xsl b/src/main/resources/org/eolang/lints/critical/not-empty-atom.xsl
new file mode 100644
index 0000000..556912f
--- /dev/null
+++ b/src/main/resources/org/eolang/lints/critical/not-empty-atom.xsl
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+The MIT License (MIT)
+
+Copyright (c) 2016-2024 Objectionary.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+-->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="not-empty-atom" version="2.0">
+  <xsl:output encoding="UTF-8" method="xml"/>
+  <xsl:template match="/">
+    <defects>
+      <xsl:for-each select="//o[@atom and o[@base]]">
+        <xsl:element name="defect">
+          <xsl:attribute name="line">
+            <xsl:value-of select="if (@line) then @line else '0'"/>
+          </xsl:attribute>
+          <xsl:attribute name="severity">
+            <xsl:text>error</xsl:text>
+          </xsl:attribute>
+          <xsl:text>The atom '</xsl:text>
+          <xsl:value-of select="@name"/>
+          <xsl:text>' may not have any attributes: </xsl:text>
+          <xsl:for-each select="o[@base]">
+            <xsl:if test="position() &gt; 1">
+              <xsl:text>, </xsl:text>
+            </xsl:if>
+            <xsl:text>'</xsl:text>
+            <xsl:value-of select="@name"/>
+            <xsl:text>'</xsl:text>
+          </xsl:for-each>
+        </xsl:element>
+      </xsl:for-each>
+    </defects>
+  </xsl:template>
+</xsl:stylesheet>
diff --git a/src/main/resources/org/eolang/lints/errors/global-nonames.xsl b/src/main/resources/org/eolang/lints/errors/global-noname.xsl
similarity index 98%
rename from src/main/resources/org/eolang/lints/errors/global-nonames.xsl
rename to src/main/resources/org/eolang/lints/errors/global-noname.xsl
index dc58181..eb914b8 100644
--- a/src/main/resources/org/eolang/lints/errors/global-nonames.xsl
+++ b/src/main/resources/org/eolang/lints/errors/global-noname.xsl
@@ -22,7 +22,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 -->
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="global-nonames" version="2.0">
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="global-noname" version="2.0">
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
diff --git a/src/main/resources/org/eolang/lints/errors/noname-attributes.xsl b/src/main/resources/org/eolang/lints/errors/noname-attribute.xsl
similarity index 96%
rename from src/main/resources/org/eolang/lints/errors/noname-attributes.xsl
rename to src/main/resources/org/eolang/lints/errors/noname-attribute.xsl
index c321414..c0178bc 100644
--- a/src/main/resources/org/eolang/lints/errors/noname-attributes.xsl
+++ b/src/main/resources/org/eolang/lints/errors/noname-attribute.xsl
@@ -22,7 +22,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 -->
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="noname-attributes" version="2.0">
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="noname-attribute" version="2.0">
   <xsl:import href="/org/eolang/parser/_funcs.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
diff --git a/src/main/resources/org/eolang/lints/errors/unknown-names.xsl b/src/main/resources/org/eolang/lints/errors/unknown-name.xsl
similarity index 98%
rename from src/main/resources/org/eolang/lints/errors/unknown-names.xsl
rename to src/main/resources/org/eolang/lints/errors/unknown-name.xsl
index 4dfc260..01a0cab 100644
--- a/src/main/resources/org/eolang/lints/errors/unknown-names.xsl
+++ b/src/main/resources/org/eolang/lints/errors/unknown-name.xsl
@@ -22,7 +22,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 -->
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="unknown-names" version="2.0">
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="unknown-name" version="2.0">
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
diff --git a/src/main/resources/org/eolang/lints/refs/broken-refs.xsl b/src/main/resources/org/eolang/lints/refs/broken-ref.xsl
similarity index 98%
rename from src/main/resources/org/eolang/lints/refs/broken-refs.xsl
rename to src/main/resources/org/eolang/lints/refs/broken-ref.xsl
index 42c1e6d..c5b5e8a 100644
--- a/src/main/resources/org/eolang/lints/refs/broken-refs.xsl
+++ b/src/main/resources/org/eolang/lints/refs/broken-ref.xsl
@@ -22,7 +22,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 -->
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="broken-refs" version="2.0">
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="broken-ref" version="2.0">
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
diff --git a/src/test/resources/org/eolang/lints/broken-alias/catches-broken-aliases.yaml b/src/test/resources/org/eolang/lints/broken-alias/catches-broken-aliases.yaml
index 559f752..52668f1 100644
--- a/src/test/resources/org/eolang/lints/broken-alias/catches-broken-aliases.yaml
+++ b/src/test/resources/org/eolang/lints/broken-alias/catches-broken-aliases.yaml
@@ -24,13 +24,12 @@ xsls:
   - /org/eolang/parser/expand-aliases.xsl
   - /org/eolang/lints/aliases/broken-alias.xsl
 tests:
-  - /defects[count(defect[@severity='error'])=22]
+  - /defects[count(defect[@severity='error'])=21]
 eo: |
   +alias FirstLetter Capital.Letters.Prohibited.Here
   +alias good Should.Be.Small
   +alias with-Dash-and-number-999 0.1.2
   +alias caseInsensitive thiS.IS.2
-  +alias the  symbol.is.not.allowed
   +alias the! symbol.is.not.allowed
   +alias the" symbol.is.not.allowed
   +alias the# symbol.is.not.allowed
diff --git a/src/test/resources/org/eolang/lints/broken-refs/broken-refs.yaml b/src/test/resources/org/eolang/lints/broken-refs/broken-refs.yaml
index 058d340..f9860f9 100644
--- a/src/test/resources/org/eolang/lints/broken-refs/broken-refs.yaml
+++ b/src/test/resources/org/eolang/lints/broken-refs/broken-refs.yaml
@@ -22,7 +22,7 @@
 ---
 xsls:
   - /org/eolang/parser/add-refs.xsl
-  - /org/eolang/lints/refs/broken-refs.xsl
+  - /org/eolang/lints/refs/broken-ref.xsl
 tests:
   - /defects[count(*)=0]
 eo: |
diff --git a/src/test/resources/org/eolang/lints/catches-global-nonames.yaml b/src/test/resources/org/eolang/lints/catches-global-nonames.yaml
index 2aab46c..f9bf0a0 100644
--- a/src/test/resources/org/eolang/lints/catches-global-nonames.yaml
+++ b/src/test/resources/org/eolang/lints/catches-global-nonames.yaml
@@ -21,7 +21,7 @@
 # SOFTWARE.
 ---
 xsls:
-  - /org/eolang/lints/errors/global-nonames.xsl
+  - /org/eolang/lints/errors/global-noname.xsl
 tests:
   - /defects[count(defect[@severity='error'])=1]
   - /defects/defect[@line='3']
diff --git a/src/test/resources/org/eolang/lints/catches-noname-attrs.yaml b/src/test/resources/org/eolang/lints/catches-noname-attrs.yaml
index 644afd1..3c28c04 100644
--- a/src/test/resources/org/eolang/lints/catches-noname-attrs.yaml
+++ b/src/test/resources/org/eolang/lints/catches-noname-attrs.yaml
@@ -22,7 +22,7 @@
 ---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
-  - /org/eolang/lints/errors/noname-attributes.xsl
+  - /org/eolang/lints/errors/noname-attribute.xsl
 tests:
   - /defects[count(defect[@severity='error'])=4]
   - /defects/defect[@line='3']
diff --git a/src/test/resources/org/eolang/lints/catches-unknown-names.yaml b/src/test/resources/org/eolang/lints/catches-unknown-names.yaml
index 3861efa..783e9d8 100644
--- a/src/test/resources/org/eolang/lints/catches-unknown-names.yaml
+++ b/src/test/resources/org/eolang/lints/catches-unknown-names.yaml
@@ -21,7 +21,7 @@
 # SOFTWARE.
 ---
 xsls:
-  - /org/eolang/lints/errors/unknown-names.xsl
+  - /org/eolang/lints/errors/unknown-name.xsl
 tests:
   - /defects[count(defect[@severity='error'])=1]
   - /defects/defect[@line='5']