diff --git a/tests/test_crossvalidation_measure.m b/tests/test_crossvalidation_measure.m
index ab3ac82d..6cfdf0ef 100644
--- a/tests/test_crossvalidation_measure.m
+++ b/tests/test_crossvalidation_measure.m
@@ -218,7 +218,7 @@ function test_pca()
     ds=struct();
     ds.samples=randn(nsamples,nfeatures);
     ds.sa.targets=mod(idxs,ntargets)+1;
-    ds.sa.chunks=mod(ceil(idxs/(ntargets*nchunks)),nchunks)+1;
+    ds.sa.chunks=mod(floor(idxs/(ntargets*nchunks)),nchunks)+1;
 
     test_msk=ds.sa.chunks==nchunks;
     partitions=struct();