diff --git a/tools/releasetools/sign_target_files_apks.py b/tools/releasetools/sign_target_files_apks.py
index 1f9a3ca..c96e616 100755
--- a/tools/releasetools/sign_target_files_apks.py
+++ b/tools/releasetools/sign_target_files_apks.py
@@ -597,7 +597,7 @@
 
     # Extract keyid using openssl command.
     p = common.Run(["openssl", "x509", "-in", key_path, "-text"],
-                   stdout=subprocess.PIPE)
+                   stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     keyid, stderr = p.communicate()
     assert p.returncode == 0, "Failed to dump certificate: {}".format(stderr)
     keyid = re.search(
diff --git a/tools/releasetools/test_sign_target_files_apks.py b/tools/releasetools/test_sign_target_files_apks.py
index 726d6b9..0cab801 100644
--- a/tools/releasetools/test_sign_target_files_apks.py
+++ b/tools/releasetools/test_sign_target_files_apks.py
@@ -16,18 +16,19 @@
 
 from __future__ import print_function
 
-import tempfile
+import os.path
 import unittest
 import zipfile
 
 import common
+import test_utils
 from sign_target_files_apks import EditTags, ReplaceVerityKeyId, RewriteProps
 
 
 class SignTargetFilesApksTest(unittest.TestCase):
 
   def setUp(self):
-    self.tempdir = common.MakeTempDir()
+    self.testdata_dir = test_utils.get_testdata_dir()
 
   def tearDown(self):
     common.Cleanup()
@@ -88,94 +89,31 @@
         "androidboot.hardware=marlin user_debug=31 ehci-hcd.park=3 "
         "lpm_levels.sleep_disabled=1 cma=32M@0-0xffffffff loop.max_part=7 "
         "buildvariant=userdebug "
-        "veritykeyid=id:485900563d272c46ae118605a47419ac09ca8c11\n")
+        "veritykeyid=id:d24f2590e9abab5cff5f59da4c4f0366e3f43e94\n")
 
-    # From build/target/product/security/verity.x509.pem.
-    VERITY_CERTIFICATE1 = """-----BEGIN CERTIFICATE-----
-MIID/TCCAuWgAwIBAgIJAJcPmDkJqolJMA0GCSqGSIb3DQEBBQUAMIGUMQswCQYD
-VQQGEwJVUzETMBEGA1UECAwKQ2FsaWZvcm5pYTEWMBQGA1UEBwwNTW91bnRhaW4g
-VmlldzEQMA4GA1UECgwHQW5kcm9pZDEQMA4GA1UECwwHQW5kcm9pZDEQMA4GA1UE
-AwwHQW5kcm9pZDEiMCAGCSqGSIb3DQEJARYTYW5kcm9pZEBhbmRyb2lkLmNvbTAe
-Fw0xNDExMDYxOTA3NDBaFw00MjAzMjQxOTA3NDBaMIGUMQswCQYDVQQGEwJVUzET
-MBEGA1UECAwKQ2FsaWZvcm5pYTEWMBQGA1UEBwwNTW91bnRhaW4gVmlldzEQMA4G
-A1UECgwHQW5kcm9pZDEQMA4GA1UECwwHQW5kcm9pZDEQMA4GA1UEAwwHQW5kcm9p
-ZDEiMCAGCSqGSIb3DQEJARYTYW5kcm9pZEBhbmRyb2lkLmNvbTCCASIwDQYJKoZI
-hvcNAQEBBQADggEPADCCAQoCggEBAOjreE0vTVSRenuzO9vnaWfk0eQzYab0gqpi
-6xAzi6dmD+ugoEKJmbPiuE5Dwf21isZ9uhUUu0dQM46dK4ocKxMRrcnmGxydFn6o
-fs3ODJMXOkv2gKXL/FdbEPdDbxzdu8z3yk+W67udM/fW7WbaQ3DO0knu+izKak/3
-T41c5uoXmQ81UNtAzRGzGchNVXMmWuTGOkg6U+0I2Td7K8yvUMWhAWPPpKLtVH9r
-AL5TzjYNR92izdKcz3AjRsI3CTjtpiVABGeX0TcjRSuZB7K9EK56HV+OFNS6I1NP
-jdD7FIShyGlqqZdUOkAUZYanbpgeT5N7QL6uuqcGpoTOkalu6kkCAwEAAaNQME4w
-HQYDVR0OBBYEFH5DM/m7oArf4O3peeKO0ZIEkrQPMB8GA1UdIwQYMBaAFH5DM/m7
-oArf4O3peeKO0ZIEkrQPMAwGA1UdEwQFMAMBAf8wDQYJKoZIhvcNAQEFBQADggEB
-AHO3NSvDE5jFvMehGGtS8BnFYdFKRIglDMc4niWSzhzOVYRH4WajxdtBWc5fx0ix
-NF/+hVKVhP6AIOQa+++sk+HIi7RvioPPbhjcsVlZe7cUEGrLSSveGouQyc+j0+m6
-JF84kszIl5GGNMTnx0XRPO+g8t6h5LWfnVydgZfpGRRg+WHewk1U2HlvTjIceb0N
-dcoJ8WKJAFWdcuE7VIm4w+vF/DYX/A2Oyzr2+QRhmYSv1cusgAeC1tvH4ap+J1Lg
-UnOu5Kh/FqPLLSwNVQp4Bu7b9QFfqK8Moj84bj88NqRGZgDyqzuTrFxn6FW7dmyA
-yttuAJAEAymk1mipd9+zp38=
------END CERTIFICATE-----
-"""
-
-    # From build/target/product/security/testkey.x509.pem.
-    VERITY_CERTIFICATE2 = """-----BEGIN CERTIFICATE-----
-MIIEqDCCA5CgAwIBAgIJAJNurL4H8gHfMA0GCSqGSIb3DQEBBQUAMIGUMQswCQYD
-VQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRhaW4g
-VmlldzEQMA4GA1UEChMHQW5kcm9pZDEQMA4GA1UECxMHQW5kcm9pZDEQMA4GA1UE
-AxMHQW5kcm9pZDEiMCAGCSqGSIb3DQEJARYTYW5kcm9pZEBhbmRyb2lkLmNvbTAe
-Fw0wODAyMjkwMTMzNDZaFw0zNTA3MTcwMTMzNDZaMIGUMQswCQYDVQQGEwJVUzET
-MBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRhaW4gVmlldzEQMA4G
-A1UEChMHQW5kcm9pZDEQMA4GA1UECxMHQW5kcm9pZDEQMA4GA1UEAxMHQW5kcm9p
-ZDEiMCAGCSqGSIb3DQEJARYTYW5kcm9pZEBhbmRyb2lkLmNvbTCCASAwDQYJKoZI
-hvcNAQEBBQADggENADCCAQgCggEBANaTGQTexgskse3HYuDZ2CU+Ps1s6x3i/waM
-qOi8qM1r03hupwqnbOYOuw+ZNVn/2T53qUPn6D1LZLjk/qLT5lbx4meoG7+yMLV4
-wgRDvkxyGLhG9SEVhvA4oU6Jwr44f46+z4/Kw9oe4zDJ6pPQp8PcSvNQIg1QCAcy
-4ICXF+5qBTNZ5qaU7Cyz8oSgpGbIepTYOzEJOmc3Li9kEsBubULxWBjf/gOBzAzU
-RNps3cO4JFgZSAGzJWQTT7/emMkod0jb9WdqVA2BVMi7yge54kdVMxHEa5r3b97s
-zI5p58ii0I54JiCUP5lyfTwE/nKZHZnfm644oLIXf6MdW2r+6R8CAQOjgfwwgfkw
-HQYDVR0OBBYEFEhZAFY9JyxGrhGGBaR0GawJyowRMIHJBgNVHSMEgcEwgb6AFEhZ
-AFY9JyxGrhGGBaR0GawJyowRoYGapIGXMIGUMQswCQYDVQQGEwJVUzETMBEGA1UE
-CBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRhaW4gVmlldzEQMA4GA1UEChMH
-QW5kcm9pZDEQMA4GA1UECxMHQW5kcm9pZDEQMA4GA1UEAxMHQW5kcm9pZDEiMCAG
-CSqGSIb3DQEJARYTYW5kcm9pZEBhbmRyb2lkLmNvbYIJAJNurL4H8gHfMAwGA1Ud
-EwQFMAMBAf8wDQYJKoZIhvcNAQEFBQADggEBAHqvlozrUMRBBVEY0NqrrwFbinZa
-J6cVosK0TyIUFf/azgMJWr+kLfcHCHJsIGnlw27drgQAvilFLAhLwn62oX6snb4Y
-LCBOsVMR9FXYJLZW2+TcIkCRLXWG/oiVHQGo/rWuWkJgU134NDEFJCJGjDbiLCpe
-+ZTWHdcwauTJ9pUbo8EvHRkU3cYfGmLaLfgn9gP+pWA7LFQNvXwBnDa6sppCccEX
-31I828XzgXpJ4O+mDL1/dBd+ek8ZPUP0IgdyZm5MTYPhvVqGCHzzTy3sIeJFymwr
-sBbmg2OAUNLEMO6nwmocSdN2ClirfxqCzJOLSDE4QyS9BAH6EhY6UFcOaE0=
------END CERTIFICATE-----
-"""
-
-    input_file = tempfile.NamedTemporaryFile(
-        delete=False, suffix='.zip', dir=self.tempdir)
-    with zipfile.ZipFile(input_file.name, 'w') as input_zip:
+    input_file = common.MakeTempFile(suffix='.zip')
+    with zipfile.ZipFile(input_file, 'w') as input_zip:
       input_zip.writestr('BOOT/cmdline', BOOT_CMDLINE1)
 
     # Test with the first certificate.
-    cert_file = tempfile.NamedTemporaryFile(
-        delete=False, suffix='.x509.pem', dir=self.tempdir)
-    cert_file.write(VERITY_CERTIFICATE1)
-    cert_file.close()
+    cert_file = os.path.join(self.testdata_dir, 'verity.x509.pem')
 
-    output_file = tempfile.NamedTemporaryFile(
-        delete=False, suffix='.zip', dir=self.tempdir)
-    with zipfile.ZipFile(input_file.name, 'r') as input_zip, \
-         zipfile.ZipFile(output_file.name, 'w') as output_zip:
-      ReplaceVerityKeyId(input_zip, output_zip, cert_file.name)
+    output_file = common.MakeTempFile(suffix='.zip')
+    with zipfile.ZipFile(input_file, 'r') as input_zip, \
+         zipfile.ZipFile(output_file, 'w') as output_zip:
+      ReplaceVerityKeyId(input_zip, output_zip, cert_file)
 
-    with zipfile.ZipFile(output_file.name) as output_zip:
+    with zipfile.ZipFile(output_file) as output_zip:
       self.assertEqual(BOOT_CMDLINE1, output_zip.read('BOOT/cmdline'))
 
     # Test with the second certificate.
-    with open(cert_file.name, 'w') as cert_file_fp:
-      cert_file_fp.write(VERITY_CERTIFICATE2)
+    cert_file = os.path.join(self.testdata_dir, 'testkey.x509.pem')
 
-    with zipfile.ZipFile(input_file.name, 'r') as input_zip, \
-         zipfile.ZipFile(output_file.name, 'w') as output_zip:
-      ReplaceVerityKeyId(input_zip, output_zip, cert_file.name)
+    with zipfile.ZipFile(input_file, 'r') as input_zip, \
+         zipfile.ZipFile(output_file, 'w') as output_zip:
+      ReplaceVerityKeyId(input_zip, output_zip, cert_file)
 
-    with zipfile.ZipFile(output_file.name) as output_zip:
+    with zipfile.ZipFile(output_file) as output_zip:
       self.assertEqual(BOOT_CMDLINE2, output_zip.read('BOOT/cmdline'))
 
   def test_ReplaceVerityKeyId_no_veritykeyid(self):
@@ -184,16 +122,14 @@
         "lpm_levels.sleep_disabled=1 msm_poweroff.download_mode=0 "
         "loop.max_part=7\n")
 
-    input_file = tempfile.NamedTemporaryFile(
-        delete=False, suffix='.zip', dir=self.tempdir)
-    with zipfile.ZipFile(input_file.name, 'w') as input_zip:
+    input_file = common.MakeTempFile(suffix='.zip')
+    with zipfile.ZipFile(input_file, 'w') as input_zip:
       input_zip.writestr('BOOT/cmdline', BOOT_CMDLINE)
 
-    output_file = tempfile.NamedTemporaryFile(
-        delete=False, suffix='.zip', dir=self.tempdir)
-    with zipfile.ZipFile(input_file.name, 'r') as input_zip, \
-         zipfile.ZipFile(output_file.name, 'w') as output_zip:
+    output_file = common.MakeTempFile(suffix='.zip')
+    with zipfile.ZipFile(input_file, 'r') as input_zip, \
+         zipfile.ZipFile(output_file, 'w') as output_zip:
       ReplaceVerityKeyId(input_zip, output_zip, None)
 
-    with zipfile.ZipFile(output_file.name) as output_zip:
+    with zipfile.ZipFile(output_file) as output_zip:
       self.assertEqual(BOOT_CMDLINE, output_zip.read('BOOT/cmdline'))
diff --git a/tools/releasetools/testdata/verity.x509.pem b/tools/releasetools/testdata/verity.x509.pem
new file mode 100644
index 0000000..86399c3
--- /dev/null
+++ b/tools/releasetools/testdata/verity.x509.pem
@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----