diff --git a/src/test/java/denoptim/io/DenoptimIOTest.java b/src/test/java/denoptim/io/DenoptimIOTest.java
index 6cedc4cf4..8b7fa89d3 100644
--- a/src/test/java/denoptim/io/DenoptimIOTest.java
+++ b/src/test/java/denoptim/io/DenoptimIOTest.java
@@ -447,8 +447,7 @@ public void testReadAllAPClasses() throws Exception {
 		frags.add(frag);
 		frags.add(frag2);
 
-		String tmpFile = FileUtils.getTempFolder()
-				+ System.getProperty("file.separator") + "frag.sdf";
+		String tmpFile = tempDir.getAbsolutePath() + SEP + "frags.sdf";
 		DenoptimIO.writeVertexesToSDF(new File(tmpFile), frags, false);
 
 		Set<APClass> allAPC = DenoptimIO.readAllAPClasses(new File(tmpFile));
@@ -665,4 +664,4 @@ public void testReadCSDFormulae() throws Exception {
         assertTrue(data.keySet().contains("BLABLA"));
         assertTrue(data.keySet().contains("A"));
     }
-}
\ No newline at end of file
+}