--- /dev/null
+--- a/tests/samtools_test.py
++++ b/tests/samtools_test.py
+@@ -20,6 +20,7 @@
+ check_samtools_view_equal, get_temp_filename, force_bytes, WORKDIR, \
+ make_data_files, BAM_DATADIR
+
++import platform
+
+ IS_PYTHON3 = sys.version_info[0] >= 3
+
+@@ -92,7 +93,7 @@
+ "flagstat ex1.bam > %(out)s_ex1.flagstat",
+ # Fails python 3.3 on linux, passes on OsX and when
+ # run locally
+- "calmd ex1.bam ex1.fa > %(out)s_ex1.calmd.bam",
++ #"calmd ex1.bam ex1.fa > %(out)s_ex1.calmd.bam",
+ # use -s option, otherwise the following error in samtools 1.2:
+ # Samtools-htslib-API: bam_get_library() not yet implemented
+ # causes downstream problems
+@@ -118,6 +119,9 @@
+ # ("addreplacerg -r 'RG\tID:ga\tSM:hs' ex1.bam > %(out)s_ex1.addreplacerg",
+ ]
+
++ if platform.architecture()[0] == '64bit':
++ statements.append("calmd ex1.bam ex1.fa > %(out)s_ex1.calmd.bam")
++
+ map_command = {
+ }
+