diff --git a/eo-parser/src/test/java/org/eolang/parser/FuncXslTest.java b/eo-parser/src/test/java/org/eolang/parser/FuncXslTest.java
deleted file mode 100644
index efdd1dc4d8..0000000000
--- a/eo-parser/src/test/java/org/eolang/parser/FuncXslTest.java
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2016-2023 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.
- */
-package org.eolang.parser;
-
-import com.jcabi.matchers.XhtmlMatchers;
-import com.jcabi.xml.ClasspathSources;
-import com.jcabi.xml.XML;
-import com.jcabi.xml.XMLDocument;
-import com.jcabi.xml.XSLDocument;
-import org.cactoos.io.InputStreamOf;
-import org.cactoos.io.ResourceOf;
-import org.hamcrest.MatcherAssert;
-import org.junit.jupiter.params.ParameterizedTest;
-import org.junit.jupiter.params.provider.CsvSource;
-
-/**
- * Test for {@see _func.xsl}.
- *
- * @since 1.0
- */
-final class FuncXslTest {
-
-    @ParameterizedTest
-    @CsvSource({
-        "00     , 0",
-        "0000   , 0",
-        "000000 , 0",
-        "000001 , 1",
-        "000010 , 16",
-        "000100 , 256",
-        "FFFFFF , 16777215"
-    })
-    void runsXslFunction(final String bytes, final String num) {
-        final XML output = new XSLDocument(
-            new InputStreamOf(
-                new ResourceOf("org/eolang/parser/apply-func.xsl")
-            )
-        )
-            .with(new ClasspathSources())
-            .transform(new XMLDocument(String.format("<o>%s</o>", bytes)));
-        MatcherAssert.assertThat(
-            output,
-            XhtmlMatchers.hasXPath(
-                String.format("/o[text()='%s']", num)
-            )
-        );
-    }
-}
diff --git a/eo-parser/src/test/java/org/eolang/parser/ParsingTrainTest.java b/eo-parser/src/test/java/org/eolang/parser/ParsingTrainTest.java
index dcc40b6f39..3801db2919 100644
--- a/eo-parser/src/test/java/org/eolang/parser/ParsingTrainTest.java
+++ b/eo-parser/src/test/java/org/eolang/parser/ParsingTrainTest.java
@@ -24,9 +24,13 @@
 package org.eolang.parser;
 
 import com.jcabi.matchers.XhtmlMatchers;
+import com.jcabi.xml.ClasspathSources;
 import com.jcabi.xml.XML;
 import com.jcabi.xml.XMLDocument;
+import com.jcabi.xml.XSLDocument;
 import com.yegor256.xsline.Xsline;
+import org.cactoos.io.InputStreamOf;
+import org.cactoos.io.ResourceOf;
 import org.eolang.jucs.ClasspathSource;
 import org.eolang.xax.XaxStory;
 import org.hamcrest.MatcherAssert;
@@ -34,6 +38,7 @@
 import org.junit.jupiter.api.Assumptions;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 /**
  * Test case for {@link ParsingTrain}.
@@ -78,6 +83,32 @@ void stopsPipeline() {
         );
     }
 
+    /**
+     * Test for {@see _func.xsl}.
+     *
+     * @since 1.0
+     */
+    @ParameterizedTest
+    @CsvSource({
+        "00     , 0",
+        "0000   , 0",
+        "000000 , 0",
+        "000001 , 1",
+        "000010 , 16",
+        "000100 , 256",
+        "FFFFFF , 16777215"
+    })
+    void runsXslFunction(final String bytes, final String num) {
+        MatcherAssert.assertThat(
+            new Xsline(
+                new ParsingTrain("/org/eolang/parser/apply-func.xsl")
+            ).pass(new XMLDocument(String.format("<o>%s</o>", bytes))),
+            XhtmlMatchers.hasXPath(
+                String.format("/o[text()='%s']", num)
+            )
+        );
+    }
+
     @ParameterizedTest
     @ClasspathSource(value = "org/eolang/parser/packs/", glob = "**.yaml")
     void parsesPacks(final String pack) throws Exception {