diff --git a/cscripts/Makefile.am b/cscripts/Makefile.am
index f030612..ab76f3d 100755
--- a/cscripts/Makefile.am
+++ b/cscripts/Makefile.am
@@ -271,7 +271,7 @@ testiactevents = $(top_srcdir)/test/data/iactdata/events/irf_file.fits.gz \
                  $(top_srcdir)/test/data/iactdata/events/events_8.fits.gz
 
 # Test data to be distributed in $(pyexecdir)/cscripts/tests/data/prod5-v0.1
-testprod501data = $(top_srcdir)/test/data/prod5-v0.1/CTA-Performance-prod5-v0.1-South-20deg.FITS.tar.gz
+testprod501data = $(top_srcdir)/test/data/prod5-v0.1/CTA-Performance-prod5-v0.1-South-20deg.FITS.tar
 
 # Install scripts, parfiles, test scripts and test data. Note that we don't
 # need to prepend $(DESTDIR) here (not fully clear why, but that's the way
diff --git a/cscripts/csadd2caldb.py b/cscripts/csadd2caldb.py
index e70b101..50d0117 100755
--- a/cscripts/csadd2caldb.py
+++ b/cscripts/csadd2caldb.py
@@ -79,11 +79,11 @@ class csadd2caldb(ctools.cscript):
         tarfiles = []
 
         # Search for tarfiles in current directory
-        files = glob.glob('%s/*.FITS.tar.gz' % indir.url())
+        files = glob.glob('%s/*.FITS.tar*' % indir.url())
         tarfiles.extend(files)
 
         # Search for tarfiles in 'fits' subdirectory
-        files = glob.glob('%s/fits/*.FITS.tar.gz' % indir.url())
+        files = glob.glob('%s/fits/*.FITS.tar*' % indir.url())
         tarfiles.extend(files)
 
         # Return tarfiles
diff --git a/test/data/prod5-v0.1/CTA-Performance-prod5-v0.1-South-20deg.FITS.tar b/test/data/prod5-v0.1/CTA-Performance-prod5-v0.1-South-20deg.FITS.tar
new file mode 100644
index 0000000..1129376
--- /dev/null
+++ b/test/data/prod5-v0.1/CTA-Performance-prod5-v0.1-South-20deg.FITS.tar
diff --git a/test/data/prod5-v0.1/CTA-Performance-prod5-v0.1-South-20deg.FITS.tar.gz b/test/data/prod5-v0.1/CTA-Performance-prod5-v0.1-South-20deg.FITS.tar.gz
deleted file mode 100644
index 052f7f3..0000000
--- a/test/data/prod5-v0.1/CTA-Performance-prod5-v0.1-South-20deg.FITS.tar.gz
+++ /dev/null