diff --git a/.travis.yml b/.travis.yml
index 91fb3920e..5571f6e78 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,7 @@ env:
   - PIP=9.0.3
   - PIP=10.0.1
   - PIP=18.0
+  - PIP=19.0
   - PIP=latest
   - PIP=master
 
diff --git a/piptools/repositories/pypi.py b/piptools/repositories/pypi.py
index bf698039c..7ceaca09c 100644
--- a/piptools/repositories/pypi.py
+++ b/piptools/repositories/pypi.py
@@ -59,7 +59,6 @@ def __init__(self, pip_options, session):
             index_urls=index_urls,
             trusted_hosts=pip_options.trusted_hosts,
             allow_all_prereleases=pip_options.pre,
-            process_dependency_links=pip_options.process_dependency_links,
             session=self.session,
         )
 
diff --git a/tests/test_cli.py b/tests/test_cli.py
index ca8c18f52..75f42d672 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1,6 +1,5 @@
 import os
 from textwrap import dedent
-from six.moves.urllib.request import pathname2url
 import subprocess
 import sys
 import mock
@@ -12,6 +11,7 @@
 from piptools.repositories import PyPIRepository
 from piptools.scripts.compile import cli
 from piptools.scripts.sync import cli as sync_cli
+from .utils import pathname_to_url
 from pip._vendor.packaging.version import parse as parse_version
 from pip import __version__ as pip_version
 
@@ -242,7 +242,7 @@ def test_sync_quiet(tmpdir):
 def test_editable_package(tmpdir):
     """ piptools can compile an editable """
     fake_package_dir = os.path.join(os.path.split(__file__)[0], 'test_data', 'small_fake_package')
-    fake_package_dir = 'file:' + pathname2url(fake_package_dir)
+    fake_package_dir = pathname_to_url(fake_package_dir)
     runner = CliRunner()
     with runner.isolated_filesystem():
         with open('requirements.in', 'w') as req_in:
@@ -278,7 +278,7 @@ def test_locally_available_editable_package_is_not_archived_in_cache_dir(tmpdir)
     cache_dir = tmpdir.mkdir('cache_dir')
 
     fake_package_dir = os.path.join(os.path.split(__file__)[0], 'test_data', 'small_fake_package')
-    fake_package_dir = 'file:' + pathname2url(fake_package_dir)
+    fake_package_dir = pathname_to_url(fake_package_dir)
 
     with mock.patch('piptools.repositories.pypi.CACHE_DIR', new=str(cache_dir)):
         runner = CliRunner()
@@ -360,7 +360,7 @@ def test_upgrade_packages_version_option(tmpdir):
 def test_generate_hashes_with_editable():
     small_fake_package_dir = os.path.join(
         os.path.split(__file__)[0], 'test_data', 'small_fake_package')
-    small_fake_package_url = 'file:' + pathname2url(small_fake_package_dir)
+    small_fake_package_url = pathname_to_url(small_fake_package_dir)
     runner = CliRunner()
     with runner.isolated_filesystem():
         with open('requirements.in', 'w') as fp:
diff --git a/tests/utils.py b/tests/utils.py
new file mode 100644
index 000000000..0c81d40cd
--- /dev/null
+++ b/tests/utils.py
@@ -0,0 +1,8 @@
+from six.moves.urllib.request import pathname2url
+
+
+def pathname_to_url(path):
+    """
+    Given a path to a file, returns an URL with 'file://' scheme
+    """
+    return 'file://' + pathname2url(path)
diff --git a/tox.ini b/tox.ini
index c41a2bc5b..8138d21de 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,7 @@ deps =
     pip9.0.3: pip==9.0.3
     pip10.0.1: pip==10.0.1
     pip18.0: pip==18.0
+    pip19.0: pip==19.0
     coverage
     mock
     pytest
@@ -25,6 +26,7 @@ setenv =
     pip9.0.3: PIP=9.0.3
     pip10.0.1: PIP=10.0.1
     pip18.0: PIP=18.0
+    pip19.0: PIP==19.0
 install_command= python -m pip install {opts} {packages}
 commands =
     pip --version
@@ -48,5 +50,6 @@ PIP =
     9.0.3: pip9.0.3
     10.0.1: pip10.0.1
     18.0: pip18.0
+    19.0: pip19.0
     latest: piplatest
     master: pipmaster