diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4c20948..b70aef7 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -2,7 +2,7 @@ name: CI
 on: [push]
 jobs:
   build-and-test:
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, ubuntu-20.04]
     steps:
       - uses: actions/checkout@v3
       - uses: conda-incubator/setup-miniconda@v2
diff --git a/test/test.py b/test/test.py
new file mode 100755
index 0000000..2fa4c28
--- /dev/null
+++ b/test/test.py
@@ -0,0 +1,262 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2019 University of Glasgow
+#
+# Author: Dario Beraldi <dario.beraldi@glasgow.ac.uk>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+# DEALINGS IN THE SOFTWARE.
+
+import unittest
+import shutil
+import os
+import subprocess
+import sys
+import gzip
+import re
+import filecmp
+from collections import OrderedDict
+
+
+class shell:
+    def __init__(self, cmd, strict=True, timeout=None):
+        print(cmd)
+        cmd = f"set -e; set -u; set -o pipefail\n{cmd}"
+        p = subprocess.Popen(
+            cmd,
+            shell=True,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            executable="/bin/bash",
+        )
+        try:
+            stdout, stderr = p.communicate(timeout=timeout)
+        except subprocess.TimeoutExpired:
+            p.kill()
+            sys.stderr.write(f"Error: Timeout after {timeout} seconds\n")
+            stdout, stderr = p.communicate()
+        self.returncode = p.returncode
+        self.stdout = stdout.decode()
+        self.stderr = stderr.decode()
+        self.cmd = cmd
+        if strict and self.returncode != 0:
+            raise subprocess.SubprocessError(
+                f"\nSTDOUT:\n{self.stdout}\nSTDERR:\n{self.stderr}\nEXIT CODE: {self.returncode}"
+            )
+
+
+def vcf_to_list(vcf_file):
+    vcf = []
+    with gzip.open(vcf_file) as gz:
+        for line in gz:
+            vcf.append(line.decode().strip().split("\t"))
+    return vcf
+
+
+def vcf_validator(vcf_file):
+    """Run vcf_validator and scan the report file. Return empty string if vcf
+    file is valid otherwise print the content of the report
+    """
+    p = subprocess.Popen(
+        "export LC_ALL=C; gzip -c -d %s | ./vcf_validator --report text" % vcf_file,
+        shell=True,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+    )
+    stdout, stderr = p.communicate()
+    log = stderr.decode().split("\n")
+    rfile = [x for x in log if x.startswith("[info] Text report written to : ")]
+    assert len(rfile) == 1
+    rfile = rfile[0].replace("[info] Text report written to : ", "")
+    with open(rfile) as f:
+        report = f.readlines()
+    os.remove(rfile)
+    if len(report) == 1 and "the input file is valid" in report[0]:
+        return ""
+    return "".join("".join(report))
+
+
+class cnv_facets(unittest.TestCase):
+    def setUp(self):
+        sys.stderr.write("\n" + self.id().split(".")[-1] + "\n")  # Print test name
+        if os.path.exists("test_out"):
+            shutil.rmtree("test_out")
+
+    def tearDown(self):
+        if os.path.exists("test_out"):
+            shutil.rmtree("test_out")
+
+    def testShowHelp(self):
+        p = shell("../bin/cnv_facets.R --help")
+        self.assertTrue("--tumour", p.stderr)
+
+    def testBamInput(self):
+        shell(
+            "../bin/cnv_facets.R -d 1 8000 -t data/TCRBOA6-T-WEX.sample.bam -n data/TCRBOA6-N-WEX.sample.bam -vcf data/common.sample.vcf.gz -o test_out/out"
+        )
+        self.assertTrue(os.path.exists("test_out/out.vcf.gz"))
+        self.assertTrue(os.path.exists("test_out/out.cnv.png"))
+        self.assertTrue(os.path.exists("test_out/out.cov.pdf"))
+        self.assertTrue(os.path.exists("test_out/out.spider.pdf"))
+        self.assertTrue(os.path.exists("test_out/out.csv.gz"))
+        self.assertEqual("", vcf_validator("test_out/out.vcf.gz"))
+
+    def testDoNotPlot(self):
+        shell(
+            """../bin/cnv_facets.R --no-cov-plot -t data/TCRBOA6-T-WEX.sample.bam -n data/TCRBOA6-N-WEX.sample.bam -vcf data/common.sample.vcf.gz -o test_out/out"""
+        )
+        self.assertTrue(os.path.exists("test_out/out.vcf.gz"))
+        self.assertTrue(os.path.exists("test_out/out.cnv.png"))
+        self.assertTrue(os.path.exists("test_out/out.spider.pdf"))
+        self.assertTrue(not os.path.exists("test_out/out.cov.pdf"))
+
+    def testBamInputNotProperlyPaired(self):
+        # Prepare a bam files with 'properly paired' flag removed
+        shell(
+            r"""
+samtools view -h data/TCRBOA6-N-WEX.sample.bam \
+| awk -v FS='\t' -v OFS='\t' '$1 ~ "^@" || $2 ~ "99|83|163|147" {if($1 ~ "^@"){print $0} else {$2=$2-2; print $0}}' \
+| samtools view -b - > tmp.n.bam &&
+samtools index tmp.n.bam &&
+
+samtools view -h data/TCRBOA6-T-WEX.sample.bam \
+| awk -v FS='\t' -v OFS='\t' '$1 ~ "^@" || $2 ~ "99|83|163|147" {if($1 ~ "^@"){print $0} else {$2=$2-2; print $0}}' \
+| samtools view -b - > tmp.t.bam &&
+samtools index tmp.t.bam 
+                """
+        )
+
+        p = shell(
+            r"""
+../bin/cnv_facets.R -d 1 8000 -t tmp.t.bam -n tmp.n.bam -vcf data/common.sample.vcf.gz -o test_out/out
+                """,
+            strict=False,
+        )
+        self.assertEqual(1, p.returncode)
+        self.assertTrue(os.path.exists("test_out/out.csv.gz"))
+        os.remove("test_out/out.csv.gz")
+
+        shell(
+            r"""
+../bin/cnv_facets.R --snp-count-orphans -d 1 8000 -t tmp.t.bam -n tmp.n.bam -vcf data/common.sample.vcf.gz -o test_out/out
+                """
+        )
+        self.assertTrue(os.path.exists("test_out/out.csv.gz"))
+        self.assertTrue(os.path.getsize("test_out/out.csv.gz") > 60000)
+        self.assertTrue(os.path.getsize("test_out/out.vcf.gz") > 1000)
+
+        for x in ["tmp.n.bam", "tmp.n.bam.bai", "tmp.t.bam", "tmp.t.bam.bai"]:
+            os.remove(x)
+
+    def testPileupInput(self):
+        shell("../bin/cnv_facets.R --pileup data/stomach.csv.gz -o test_out/out")
+        self.assertTrue(os.path.exists("test_out/out.vcf.gz"))
+        self.assertTrue(os.path.exists("test_out/out.cnv.png"))
+        self.assertTrue(os.path.exists("test_out/out.cov.pdf"))
+        self.assertTrue(os.path.exists("test_out/out.spider.pdf"))
+        self.assertEqual("", vcf_validator("test_out/out.vcf.gz"))
+
+    def testFailOnSnpPileup(self):
+        p = shell(
+            "../bin/cnv_facets.R -t data/INVALID.bam -n data/TCRBOA6-N-WEX.sample.bam -vcf data/common.sample.vcf.gz -o test_out/out",
+            strict=False,
+        )
+        self.assertTrue(p.returncode != 0)
+        # Check we exited immediatly after failing the first snp-pileup
+        self.assertEqual(1, p.stderr.count("samtools view: failed to open"))
+
+    def testTargetPanel(self):
+        shell(
+            "../bin/cnv_facets.R -T data/stomach_targets_chr.bed -p data/stomach_chr.csv.gz -o test_out/out"
+        )
+        self.assertEqual("", vcf_validator("test_out/out.vcf.gz"))
+        vcf = vcf_to_list("test_out/out.vcf.gz")
+        vcf = [line for line in vcf if not line[0].startswith("#")]
+        chroms = set([line[0] for line in vcf])
+        self.assertTrue("chr1" in chroms)
+        self.assertTrue("chr2" in chroms)
+        self.assertTrue("chr3" in chroms)
+        self.assertTrue("chr4" in chroms)
+        self.assertTrue("chrX" in chroms)
+        self.assertTrue("chr11" not in chroms)
+        self.assertTrue("chr12" not in chroms)
+        self.assertTrue("chr13" not in chroms)
+
+        chr1 = [line for line in vcf if line[0] == "chr1"]
+        self.assertTrue(int(chr1[0][1]) > 1000000)
+        self.assertTrue(int(chr1[len(chr1) - 1][1]) < 100000000)
+
+        # Without chr prefix
+        shell(
+            "../bin/cnv_facets.R -T data/stomach_targets.bed -p data/stomach.csv.gz -o test_out/out"
+        )
+        self.assertEqual("", vcf_validator("test_out/out.vcf.gz"))
+
+        vcf = vcf_to_list("test_out/out.vcf.gz")
+        vcf = [line for line in vcf if not line[0].startswith("#")]
+        chroms = set([line[0] for line in vcf])
+        self.assertTrue("1" in chroms)
+        self.assertTrue("13" not in chroms)
+
+        chr1 = [line for line in vcf if line[0] == "1"]
+        self.assertTrue(int(chr1[0][1]) > 1000000)
+        self.assertTrue(int(chr1[len(chr1) - 1][1]) < 100000000)
+
+    def testSingleEndBam(self):
+        # Prepare single-end files
+        shell(
+            r"""
+        mkdir test_out
+        for sample in TCRBOA6-N TCRBOA6-T
+        do
+            samtools view -h data/${sample}-WEX.sample.bam \
+            | awk -v OFS='\t' -v FS='\t' '{if($1 ~ "^@"){print $0} 
+                if($2 == 99) {
+                    $2 = 0; print $0
+                } else if($2 == 163) {
+                    $2 = 16; print $0}
+                }' \
+            | samtools view -b - > test_out/${sample}-WEX.se.bam
+             samtools index test_out/${sample}-WEX.se.bam
+        done
+        """
+        )
+
+        shell(
+            "../bin/cnv_facets.R -t test_out/TCRBOA6-T-WEX.se.bam -n test_out/TCRBOA6-N-WEX.se.bam -vcf data/common.sample.vcf.gz -o test_out/out"
+        )
+        self.assertTrue(os.path.exists("test_out/out.csv.gz"))
+        self.assertEqual("", vcf_validator("test_out/out.vcf.gz"))
+        self.assertTrue(
+            os.path.getsize("test_out/out.csv.gz") > 60000
+            and os.path.getsize("test_out/out.csv.gz") < 70000
+        )
+
+        shell(
+            "../bin/cnv_facets.R -t test_out/TCRBOA6-T-WEX.se.bam --nbhd-snp 10 -n test_out/TCRBOA6-N-WEX.se.bam -vcf data/common.sample.vcf.gz -o test_out/out"
+        )
+        self.assertTrue(os.path.exists("test_out/out.csv.gz"))
+        self.assertEqual("", vcf_validator("test_out/out.vcf.gz"))
+        self.assertTrue(
+            os.path.getsize("test_out/out.csv.gz") > 300000
+            and os.path.getsize("test_out/out.csv.gz") < 400000
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/test/test_cnv_facets.py b/test/test_cnv_facets.py
deleted file mode 100755
index 3172925..0000000
--- a/test/test_cnv_facets.py
+++ /dev/null
@@ -1,224 +0,0 @@
-#!/usr/bin/env python3
-#
-# Copyright (C) 2018-2019 University of Glasgow
-#
-# Author: Dario Beraldi <dario.beraldi@glasgow.ac.uk>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
-# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-# DEALINGS IN THE SOFTWARE.
-
-import unittest
-import shutil
-import os
-import subprocess as sp
-import sys
-import gzip
-import re
-import filecmp
-from collections import OrderedDict
-
-def vcf_to_list(vcf_file):
-    vcf= []
-    with gzip.open(vcf_file) as gz:
-        for line in gz:
-            vcf.append(line.decode().strip().split('\t'))
-    return vcf
-
-def vcf_validator(vcf_file):
-    """Run vcf_validator and scan the report file. Return empty string if vcf
-    file is valid otherwise print the content of the report
-    """
-    p = sp.Popen("export LC_ALL=C; gzip -c -d %s | ./vcf_validator --report text" % vcf_file, shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-    stdout, stderr = p.communicate()
-    log= stderr.decode().split('\n')
-    rfile= [x for x in log if x.startswith('[info] Text report written to : ')]
-    assert len(rfile) == 1
-    rfile= rfile[0].replace('[info] Text report written to : ', '')
-    with open(rfile) as f:
-        report= f.readlines()
-    os.remove(rfile)
-    if len(report) == 1 and 'the input file is valid' in report[0]:
-        return ''
-    return ''.join(''.join(report))
-
-class cnv_facets(unittest.TestCase):
-
-    def setUp(self):
-        sys.stderr.write('\n' + self.id().split('.')[-1] + ' ') # Print test name
-        if os.path.exists('test_out'):
-            shutil.rmtree('test_out')
-
-    def tearDown(self):
-        if os.path.exists('test_out'):
-            shutil.rmtree('test_out')
-
-    def testShowHelp(self):
-        p = sp.Popen("../bin/cnv_facets.R --help", shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(0, p.returncode)
-        self.assertTrue('--tumour', stderr.decode())
-        
-    def testBamInput(self):
-        p = sp.Popen("../bin/cnv_facets.R -d 1 8000 -t data/TCRBOA6-T-WEX.sample.bam -n data/TCRBOA6-N-WEX.sample.bam -vcf data/common.sample.vcf.gz -o test_out/out", shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(0, p.returncode)
-        self.assertTrue(os.path.exists('test_out/out.vcf.gz'))
-        self.assertTrue(os.path.exists('test_out/out.cnv.png'))
-        self.assertTrue(os.path.exists('test_out/out.cov.pdf'))
-        self.assertTrue(os.path.exists('test_out/out.spider.pdf'))
-        self.assertTrue(os.path.exists('test_out/out.csv.gz'))
-        self.assertEqual('', vcf_validator('test_out/out.vcf.gz'))
-
-    def testDoNotPlot(self):
-        p = sp.Popen("""../bin/cnv_facets.R --no-cov-plot -t data/TCRBOA6-T-WEX.sample.bam -n data/TCRBOA6-N-WEX.sample.bam -vcf data/common.sample.vcf.gz -o test_out/out""", shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(0, p.returncode)
-        self.assertTrue(os.path.exists('test_out/out.vcf.gz'))
-        self.assertTrue(os.path.exists('test_out/out.cnv.png'))
-        self.assertTrue(os.path.exists('test_out/out.spider.pdf'))
-        self.assertTrue(not os.path.exists('test_out/out.cov.pdf'))
-
-    def testBamInputNotProperlyPaired(self):
-        # Prepare a bam files with 'properly paired' flag removed
-        p = sp.Popen(r"""
-samtools view -h data/TCRBOA6-N-WEX.sample.bam \
-| awk -v FS='\t' -v OFS='\t' '$1 ~ "^@" || $2 ~ "99|83|163|147" {if($1 ~ "^@"){print $0} else {$2=$2-2; print $0}}' \
-| samtools view -b - > tmp.n.bam &&
-samtools index tmp.n.bam &&
-
-samtools view -h data/TCRBOA6-T-WEX.sample.bam \
-| awk -v FS='\t' -v OFS='\t' '$1 ~ "^@" || $2 ~ "99|83|163|147" {if($1 ~ "^@"){print $0} else {$2=$2-2; print $0}}' \
-| samtools view -b - > tmp.t.bam &&
-samtools index tmp.t.bam 
-                """, shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        assert 0 == p.returncode
-
-        p = sp.Popen(r"""
-../bin/cnv_facets.R -d 1 8000 -t tmp.t.bam -n tmp.n.bam -vcf data/common.sample.vcf.gz -o test_out/out
-                """, shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(1, p.returncode)
-        self.assertTrue(os.path.exists('test_out/out.csv.gz'))
-        os.remove('test_out/out.csv.gz')
-
-        p = sp.Popen(r"""
-../bin/cnv_facets.R --snp-count-orphans -d 1 8000 -t tmp.t.bam -n tmp.n.bam -vcf data/common.sample.vcf.gz -o test_out/out
-                """, shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(0, p.returncode)
-        self.assertTrue(os.path.exists('test_out/out.csv.gz'))
-        self.assertTrue(os.path.getsize("test_out/out.csv.gz") > 60000)
-        self.assertTrue(os.path.getsize("test_out/out.vcf.gz") > 1000)
-
-        for x in ['tmp.n.bam', 'tmp.n.bam.bai', 'tmp.t.bam', 'tmp.t.bam.bai']:
-            os.remove(x)
-
-    def testPileupInput(self):
-        p = sp.Popen("../bin/cnv_facets.R --pileup data/stomach.csv.gz -o test_out/out", shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(0, p.returncode)
-        self.assertTrue(os.path.exists('test_out/out.vcf.gz'))
-        self.assertTrue(os.path.exists('test_out/out.cnv.png'))
-        self.assertTrue(os.path.exists('test_out/out.cov.pdf'))
-        self.assertTrue(os.path.exists('test_out/out.spider.pdf'))
-        self.assertEqual('', vcf_validator('test_out/out.vcf.gz'))
-
-    def testFailOnSnpPileup(self):
-        p = sp.Popen("../bin/cnv_facets.R -t data/INVALID.bam -n data/TCRBOA6-N-WEX.sample.bam -vcf data/common.sample.vcf.gz -o test_out/out", 
-                shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertTrue(p.returncode != 0)
-        # Check we exited immediatly after failing the first snp-pileup
-        self.assertEqual(1, stderr.count(b'samtools view: failed to open'))
-
-    def testTargetPanel(self):
-        p = sp.Popen("../bin/cnv_facets.R -T data/stomach_targets_chr.bed -p data/stomach_chr.csv.gz -o test_out/out",
-                shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(0, p.returncode)
-        self.assertEqual('', vcf_validator('test_out/out.vcf.gz'))
-        vcf= vcf_to_list('test_out/out.vcf.gz')
-        vcf= [line for line in vcf if not line[0].startswith('#')]
-        chroms= set([line[0] for line in vcf])
-        self.assertTrue('chr1' in chroms)
-        self.assertTrue('chr2' in chroms)
-        self.assertTrue('chr3' in chroms)
-        self.assertTrue('chr4' in chroms)
-        self.assertTrue('chrX' in chroms)
-        self.assertTrue('chr11' not in chroms)
-        self.assertTrue('chr12' not in chroms)
-        self.assertTrue('chr13' not in chroms)
-        
-        chr1= [line for line in vcf if line[0] == 'chr1']
-        self.assertTrue(int(chr1[0][1]) >  1000000)
-        self.assertTrue(int(chr1[len(chr1)-1][1]) < 100000000)
-
-        # Without chr prefix
-        p = sp.Popen("../bin/cnv_facets.R -T data/stomach_targets.bed -p data/stomach.csv.gz -o test_out/out",
-                shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(0, p.returncode)
-        self.assertEqual('', vcf_validator('test_out/out.vcf.gz'))
-
-        vcf= vcf_to_list('test_out/out.vcf.gz')
-        vcf= [line for line in vcf if not line[0].startswith('#')]
-        chroms= set([line[0] for line in vcf])
-        self.assertTrue('1' in chroms)
-        self.assertTrue('13' not in chroms)
-        
-        chr1= [line for line in vcf if line[0] == '1']
-        self.assertTrue(int(chr1[0][1]) >  1000000)
-        self.assertTrue(int(chr1[len(chr1)-1][1]) < 100000000)
-
-    def testSingleEndBam(self):
-        # Prepare single-end files
-        p= sp.check_call(r"""
-        mkdir test_out
-        for sample in TCRBOA6-N TCRBOA6-T
-        do
-            samtools view -h data/${sample}-WEX.sample.bam \
-            | awk -v OFS='\t' -v FS='\t' '{if($1 ~ "^@"){print $0} 
-                if($2 == 99) {
-                    $2 = 0; print $0
-                } else if($2 == 163) {
-                    $2 = 16; print $0}
-                }' \
-            | samtools view -b - > test_out/${sample}-WEX.se.bam
-             samtools index test_out/${sample}-WEX.se.bam
-        done
-        """, shell= True)
-        
-        p = sp.Popen("../bin/cnv_facets.R -t test_out/TCRBOA6-T-WEX.se.bam -n test_out/TCRBOA6-N-WEX.se.bam -vcf data/common.sample.vcf.gz -o test_out/out", shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(0, p.returncode)
-        self.assertTrue(os.path.exists('test_out/out.csv.gz'))
-        self.assertEqual('', vcf_validator('test_out/out.vcf.gz'))
-        self.assertTrue(os.path.getsize("test_out/out.csv.gz") > 60000 and 
-                os.path.getsize("test_out/out.csv.gz") < 70000)
-
-        p = sp.Popen("../bin/cnv_facets.R -t test_out/TCRBOA6-T-WEX.se.bam --nbhd-snp 10 -n test_out/TCRBOA6-N-WEX.se.bam -vcf data/common.sample.vcf.gz -o test_out/out", shell=True, stdout= sp.PIPE, stderr= sp.PIPE)
-        stdout, stderr = p.communicate()
-        self.assertEqual(0, p.returncode)
-        self.assertTrue(os.path.exists('test_out/out.csv.gz'))
-        self.assertEqual('', vcf_validator('test_out/out.vcf.gz'))
-        self.assertTrue(os.path.getsize("test_out/out.csv.gz") > 300000 and 
-                os.path.getsize("test_out/out.csv.gz") < 400000)
-
-if __name__ == '__main__':
-    unittest.main()