Search for sequential Pastix.

test/CMakeLists.txt

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 12c12b0..e1eef08 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -100,7 +100,7 @@
 endif()
 
 
-find_package(PASTIX QUIET COMPONENTS METIS SCOTCH)
+find_package(PASTIX QUIET COMPONENTS METIS SEQ)
 # check that the PASTIX found is a version without MPI
 find_path(PASTIX_pastix_nompi.h_INCLUDE_DIRS
   NAMES pastix_nompi.h