diff --git a/pmd-core/src/test/java/net/sourceforge/pmd/processor/MultiThreadProcessorTest.java b/pmd-core/src/test/java/net/sourceforge/pmd/lang/impl/MultiThreadProcessorTest.java
similarity index 96%
rename from pmd-core/src/test/java/net/sourceforge/pmd/processor/MultiThreadProcessorTest.java
rename to pmd-core/src/test/java/net/sourceforge/pmd/lang/impl/MultiThreadProcessorTest.java
index 0bfc95124c..67bbe52fac 100644
--- a/pmd-core/src/test/java/net/sourceforge/pmd/processor/MultiThreadProcessorTest.java
+++ b/pmd-core/src/test/java/net/sourceforge/pmd/lang/impl/MultiThreadProcessorTest.java
@@ -2,7 +2,7 @@
  * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
  */
 
-package net.sourceforge.pmd.processor;
+package net.sourceforge.pmd.lang.impl;
 
 import static net.sourceforge.pmd.util.CollectionUtil.listOf;
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -31,6 +31,7 @@ class MultiThreadProcessorTest {
     PmdAnalysis setupForTest(final String ruleset) {
         PMDConfiguration configuration = new PMDConfiguration();
         configuration.setThreads(2);
+        configuration.setIgnoreIncrementalAnalysis(true);
         PmdAnalysis pmd = PmdAnalysis.create(configuration);
         LanguageVersion lv = DummyLanguageModule.getInstance().getDefaultVersion();
         pmd.files().addFile(TextFile.forCharSeq("abc", "file1-violation.dummy", lv));
@@ -47,7 +48,7 @@ class MultiThreadProcessorTest {
         return pmd;
     }
 
-    // Dysfunctional rules are pruned upstream of the processor.
+    // TODO: Dysfunctional rules are pruned upstream of the processor.
     //
     //    @Test
     //    void testRulesDysnfunctionalLog() throws Exception {
diff --git a/pmd-core/src/test/resources/rulesets/MultiThreadProcessorTest/basic.xml b/pmd-core/src/test/resources/rulesets/MultiThreadProcessorTest/basic.xml
index 71b65b500e..203b57ea47 100644
--- a/pmd-core/src/test/resources/rulesets/MultiThreadProcessorTest/basic.xml
+++ b/pmd-core/src/test/resources/rulesets/MultiThreadProcessorTest/basic.xml
@@ -6,10 +6,10 @@
   Ruleset used by test RuleSetReferenceIdTest
   </description>
 
-    <rule name="NotThreadSafeRule" language="dummy" since="1.0" message="Not thread safe" class="net.sourceforge.pmd.processor.MultiThreadProcessorTest$NotThreadSafeRule"
+    <rule name="NotThreadSafeRule" language="dummy" since="1.0" message="Not thread safe" class="net.sourceforge.pmd.lang.impl.MultiThreadProcessorTest$NotThreadSafeRule"
         externalInfoUrl="foo">
         <description>Foo</description>
         <priority>3</priority>
         <example></example>
     </rule>
-</ruleset>
\ No newline at end of file
+</ruleset>
diff --git a/pmd-core/src/test/resources/rulesets/MultiThreadProcessorTest/dysfunctional.xml b/pmd-core/src/test/resources/rulesets/MultiThreadProcessorTest/dysfunctional.xml
index 7ee4f275f9..fa4b6468b7 100644
--- a/pmd-core/src/test/resources/rulesets/MultiThreadProcessorTest/dysfunctional.xml
+++ b/pmd-core/src/test/resources/rulesets/MultiThreadProcessorTest/dysfunctional.xml
@@ -6,10 +6,10 @@
   Ruleset used by test MultiThreadProcessorTest
   </description>
 
-    <rule name="DysfunctionalRule" language="dummy" since="1.0" message="dysfunctional rule" class="net.sourceforge.pmd.processor.MultiThreadProcessorTest$DysfunctionalRule"
+    <rule name="DysfunctionalRule" language="dummy" since="1.0" message="dysfunctional rule" class="net.sourceforge.pmd.lang.impl.MultiThreadProcessorTest$DysfunctionalRule"
         externalInfoUrl="foo">
         <description>Dysfunctional</description>
         <priority>3</priority>
         <example></example>
     </rule>
-</ruleset>
\ No newline at end of file
+</ruleset>