diff --git a/.Rbuildignore b/.Rbuildignore
index aa7059a3b2102a246821ef37d6ddd1d831deb5f0..98316ccfd13a0286857a3ce70b87bc08517f8cb6 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -9,7 +9,7 @@
 ^inst/doc$
 ^\.gitlab-ci\.yml$
 ## unit tests should be ignored when building the package for CRAN
-^tests$
+#^tests$
 ^inst/PlotProfiling\.R$
 ^.gitlab$
 # Suggested by http://r-pkgs.had.co.nz/package.html
diff --git a/R/Compute.R b/R/Compute.R
index 5a58abd9467bf91c1cea057d13b1bbada0afc1ba..5fe4b734c44bd3b4464afa8593fe6c971519cf90 100644
--- a/R/Compute.R
+++ b/R/Compute.R
@@ -155,6 +155,12 @@ Compute <- function(workflow, chunks = 'auto', workflow_manager = 'ecFlow',
       stop("Workflows with only one step supported by now.")
     }
 
+    if (any(names(chunks) == attr(workflow$inputs$input1, "PatternDim"))) {
+      stop(paste0("Chunking along the pattern dimension ",
+                  attr(workflow$inputs$input1, "PatternDim"),
+                  " is not allowed for now."))
+    }
+
     # Run ByChunks with the chosen operation
     if (!is.null(cluster)) {
       if (is.null(workflow_manager)) {