diff --git a/src/Math-Matrix/PMNDArrayTest.class.st b/src/Math-Tests-Matrix/PMNDArrayTest.class.st
similarity index 99%
rename from src/Math-Matrix/PMNDArrayTest.class.st
rename to src/Math-Tests-Matrix/PMNDArrayTest.class.st
index f2bb1005..4486534d 100644
--- a/src/Math-Matrix/PMNDArrayTest.class.st
+++ b/src/Math-Tests-Matrix/PMNDArrayTest.class.st
@@ -1,7 +1,7 @@
 Class {
 	#name : #PMNDArrayTest,
 	#superclass : #TestCase,
-	#category : #'Math-Matrix'
+	#category : #'Math-Tests-Matrix'
 }
 
 { #category : #tests }