diff --git a/poetry/installation/installer.py b/poetry/installation/installer.py
index 6956ae85fde..2164d39f4b1 100644
--- a/poetry/installation/installer.py
+++ b/poetry/installation/installer.py
@@ -178,12 +178,24 @@ def use_executor(self, use_executor=True):  # type: (bool) -> Installer
         return self
 
     def _do_refresh(self):
+        from poetry.puzzle import Solver
+
         # Checking extras
         for extra in self._extras:
             if extra not in self._package.extras:
                 raise ValueError("Extra [{}] is not specified.".format(extra))
 
-        ops = self._get_operations_from_lock(self._locker.locked_repository(True))
+        locked_repository = self._locker.locked_repository(True)
+        solver = Solver(
+            self._package,
+            self._pool,
+            locked_repository,
+            locked_repository,
+            self._io,  # noqa
+        )
+
+        ops = solver.solve(use_latest=[])
+
         local_repo = Repository()
         self._populate_local_repo(local_repo, ops)
 
diff --git a/tests/fixtures/old_lock/poetry.lock b/tests/fixtures/old_lock/poetry.lock
new file mode 100644
index 00000000000..57d585709e8
--- /dev/null
+++ b/tests/fixtures/old_lock/poetry.lock
@@ -0,0 +1,153 @@
+[[package]]
+category = "main"
+description = "Python package for providing Mozilla's CA Bundle."
+name = "certifi"
+optional = false
+python-versions = "*"
+version = "2020.6.20"
+
+[[package]]
+category = "main"
+description = "Universal encoding detector for Python 2 and 3"
+name = "chardet"
+optional = false
+python-versions = "*"
+version = "3.0.4"
+
+[[package]]
+category = "main"
+description = "A Python library for the Docker Engine API."
+name = "docker"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "4.3.1"
+
+[package.dependencies]
+pywin32 = "227"
+requests = ">=2.14.2,<2.18.0 || >2.18.0"
+six = ">=1.4.0"
+websocket-client = ">=0.32.0"
+
+[package.extras]
+ssh = ["paramiko (>=2.4.2)"]
+tls = ["pyOpenSSL (>=17.5.0)", "cryptography (>=1.3.4)", "idna (>=2.0.0)"]
+
+[[package]]
+category = "main"
+description = "Internationalized Domain Names in Applications (IDNA)"
+name = "idna"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "2.10"
+
+[[package]]
+category = "main"
+description = "Python for Window Extensions"
+marker = "sys_platform == \"win32\""
+name = "pywin32"
+optional = false
+python-versions = "*"
+version = "227"
+
+[[package]]
+category = "main"
+description = "Python HTTP for Humans."
+name = "requests"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "2.24.0"
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+chardet = ">=3.0.2,<4"
+idna = ">=2.5,<3"
+urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
+
+[package.extras]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+
+[[package]]
+category = "main"
+description = "Python 2 and 3 compatibility utilities"
+name = "six"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "1.15.0"
+
+[[package]]
+category = "main"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+name = "urllib3"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+version = "1.25.10"
+
+[package.extras]
+brotli = ["brotlipy (>=0.6.0)"]
+secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0.14)", "ipaddress"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+
+[[package]]
+category = "main"
+description = "WebSocket client for Python. hybi13 is supported."
+name = "websocket-client"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "0.57.0"
+
+[package.dependencies]
+six = "*"
+
+[metadata]
+content-hash = "bb4c2f3c089b802c1930b6acbeed04711d93e9cdfd9a003eb17518a6d9f350c6"
+lock-version = "1.0"
+python-versions = "^3.8"
+
+[metadata.files]
+certifi = [
+    {file = "certifi-2020.6.20-py2.py3-none-any.whl", hash = "sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41"},
+    {file = "certifi-2020.6.20.tar.gz", hash = "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3"},
+]
+chardet = [
+    {file = "chardet-3.0.4-py2.py3-none-any.whl", hash = "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"},
+    {file = "chardet-3.0.4.tar.gz", hash = "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"},
+]
+docker = [
+    {file = "docker-4.3.1-py2.py3-none-any.whl", hash = "sha256:13966471e8bc23b36bfb3a6fb4ab75043a5ef1dac86516274777576bed3b9828"},
+    {file = "docker-4.3.1.tar.gz", hash = "sha256:bad94b8dd001a8a4af19ce4becc17f41b09f228173ffe6a4e0355389eef142f2"},
+]
+idna = [
+    {file = "idna-2.10-py2.py3-none-any.whl", hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"},
+    {file = "idna-2.10.tar.gz", hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"},
+]
+pywin32 = [
+    {file = "pywin32-227-cp27-cp27m-win32.whl", hash = "sha256:371fcc39416d736401f0274dd64c2302728c9e034808e37381b5e1b22be4a6b0"},
+    {file = "pywin32-227-cp27-cp27m-win_amd64.whl", hash = "sha256:4cdad3e84191194ea6d0dd1b1b9bdda574ff563177d2adf2b4efec2a244fa116"},
+    {file = "pywin32-227-cp35-cp35m-win32.whl", hash = "sha256:f4c5be1a293bae0076d93c88f37ee8da68136744588bc5e2be2f299a34ceb7aa"},
+    {file = "pywin32-227-cp35-cp35m-win_amd64.whl", hash = "sha256:a929a4af626e530383a579431b70e512e736e9588106715215bf685a3ea508d4"},
+    {file = "pywin32-227-cp36-cp36m-win32.whl", hash = "sha256:300a2db938e98c3e7e2093e4491439e62287d0d493fe07cce110db070b54c0be"},
+    {file = "pywin32-227-cp36-cp36m-win_amd64.whl", hash = "sha256:9b31e009564fb95db160f154e2aa195ed66bcc4c058ed72850d047141b36f3a2"},
+    {file = "pywin32-227-cp37-cp37m-win32.whl", hash = "sha256:47a3c7551376a865dd8d095a98deba954a98f326c6fe3c72d8726ca6e6b15507"},
+    {file = "pywin32-227-cp37-cp37m-win_amd64.whl", hash = "sha256:31f88a89139cb2adc40f8f0e65ee56a8c585f629974f9e07622ba80199057511"},
+    {file = "pywin32-227-cp38-cp38-win32.whl", hash = "sha256:7f18199fbf29ca99dff10e1f09451582ae9e372a892ff03a28528a24d55875bc"},
+    {file = "pywin32-227-cp38-cp38-win_amd64.whl", hash = "sha256:7c1ae32c489dc012930787f06244426f8356e129184a02c25aef163917ce158e"},
+    {file = "pywin32-227-cp39-cp39-win32.whl", hash = "sha256:c054c52ba46e7eb6b7d7dfae4dbd987a1bb48ee86debe3f245a2884ece46e295"},
+    {file = "pywin32-227-cp39-cp39-win_amd64.whl", hash = "sha256:f27cec5e7f588c3d1051651830ecc00294f90728d19c3bf6916e6dba93ea357c"},
+]
+requests = [
+    {file = "requests-2.24.0-py2.py3-none-any.whl", hash = "sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898"},
+    {file = "requests-2.24.0.tar.gz", hash = "sha256:b3559a131db72c33ee969480840fff4bb6dd111de7dd27c8ee1f820f4f00231b"},
+]
+six = [
+    {file = "six-1.15.0-py2.py3-none-any.whl", hash = "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"},
+    {file = "six-1.15.0.tar.gz", hash = "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259"},
+]
+urllib3 = [
+    {file = "urllib3-1.25.10-py2.py3-none-any.whl", hash = "sha256:e7983572181f5e1522d9c98453462384ee92a0be7fac5f1413a1e35c56cc0461"},
+    {file = "urllib3-1.25.10.tar.gz", hash = "sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a"},
+]
+websocket-client = [
+    {file = "websocket_client-0.57.0-py2.py3-none-any.whl", hash = "sha256:0fc45c961324d79c781bab301359d5a1b00b13ad1b10415a4780229ef71a5549"},
+    {file = "websocket_client-0.57.0.tar.gz", hash = "sha256:d735b91d6d1692a6a181f2a8c9e0238e5f6373356f561bb9dc4c7af36f452010"},
+]
diff --git a/tests/fixtures/old_lock/pyproject.toml b/tests/fixtures/old_lock/pyproject.toml
new file mode 100644
index 00000000000..56ea6350953
--- /dev/null
+++ b/tests/fixtures/old_lock/pyproject.toml
@@ -0,0 +1,15 @@
+[tool.poetry]
+name = "foobar"
+version = "0.1.0"
+description = ""
+authors = ["Poetry Developer <developer@python-poetry.org>"]
+
+[tool.poetry.dependencies]
+python = "^3.8"
+docker = "^4.3.1"
+
+[tool.poetry.dev-dependencies]
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
diff --git a/tests/fixtures/old_lock/updated.lock b/tests/fixtures/old_lock/updated.lock
new file mode 100644
index 00000000000..22cd049e68f
--- /dev/null
+++ b/tests/fixtures/old_lock/updated.lock
@@ -0,0 +1,152 @@
+[[package]]
+name = "certifi"
+version = "2020.6.20"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "chardet"
+version = "3.0.4"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "docker"
+version = "4.3.1"
+description = "A Python library for the Docker Engine API."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.dependencies]
+pywin32 = {version = "227", markers = "sys_platform == \"win32\""}
+requests = ">=2.14.2,<2.18.0 || >2.18.0"
+six = ">=1.4.0"
+websocket-client = ">=0.32.0"
+
+[package.extras]
+ssh = ["paramiko (>=2.4.2)"]
+tls = ["pyOpenSSL (>=17.5.0)", "cryptography (>=1.3.4)", "idna (>=2.0.0)"]
+
+[[package]]
+name = "idna"
+version = "2.10"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "pywin32"
+version = "227"
+description = "Python for Window Extensions"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "requests"
+version = "2.24.0"
+description = "Python HTTP for Humans."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+chardet = ">=3.0.2,<4"
+idna = ">=2.5,<3"
+urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
+
+[package.extras]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+
+[[package]]
+name = "six"
+version = "1.15.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "urllib3"
+version = "1.25.10"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+
+[package.extras]
+brotli = ["brotlipy (>=0.6.0)"]
+secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0.14)", "ipaddress"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+
+[[package]]
+name = "websocket-client"
+version = "0.57.0"
+description = "WebSocket client for Python. hybi13 is supported."
+category = "main"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+six = "*"
+
+[metadata]
+lock-version = "1.1"
+python-versions = "^3.8"
+content-hash = "bb4c2f3c089b802c1930b6acbeed04711d93e9cdfd9a003eb17518a6d9f350c6"
+
+[metadata.files]
+certifi = [
+    {file = "certifi-2020.6.20-py2.py3-none-any.whl", hash = "sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41"},
+    {file = "certifi-2020.6.20.tar.gz", hash = "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3"},
+]
+chardet = [
+    {file = "chardet-3.0.4-py2.py3-none-any.whl", hash = "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"},
+    {file = "chardet-3.0.4.tar.gz", hash = "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"},
+]
+docker = [
+    {file = "docker-4.3.1-py2.py3-none-any.whl", hash = "sha256:13966471e8bc23b36bfb3a6fb4ab75043a5ef1dac86516274777576bed3b9828"},
+    {file = "docker-4.3.1.tar.gz", hash = "sha256:bad94b8dd001a8a4af19ce4becc17f41b09f228173ffe6a4e0355389eef142f2"},
+]
+idna = [
+    {file = "idna-2.10-py2.py3-none-any.whl", hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"},
+    {file = "idna-2.10.tar.gz", hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"},
+]
+pywin32 = [
+    {file = "pywin32-227-cp27-cp27m-win32.whl", hash = "sha256:371fcc39416d736401f0274dd64c2302728c9e034808e37381b5e1b22be4a6b0"},
+    {file = "pywin32-227-cp27-cp27m-win_amd64.whl", hash = "sha256:4cdad3e84191194ea6d0dd1b1b9bdda574ff563177d2adf2b4efec2a244fa116"},
+    {file = "pywin32-227-cp35-cp35m-win32.whl", hash = "sha256:f4c5be1a293bae0076d93c88f37ee8da68136744588bc5e2be2f299a34ceb7aa"},
+    {file = "pywin32-227-cp35-cp35m-win_amd64.whl", hash = "sha256:a929a4af626e530383a579431b70e512e736e9588106715215bf685a3ea508d4"},
+    {file = "pywin32-227-cp36-cp36m-win32.whl", hash = "sha256:300a2db938e98c3e7e2093e4491439e62287d0d493fe07cce110db070b54c0be"},
+    {file = "pywin32-227-cp36-cp36m-win_amd64.whl", hash = "sha256:9b31e009564fb95db160f154e2aa195ed66bcc4c058ed72850d047141b36f3a2"},
+    {file = "pywin32-227-cp37-cp37m-win32.whl", hash = "sha256:47a3c7551376a865dd8d095a98deba954a98f326c6fe3c72d8726ca6e6b15507"},
+    {file = "pywin32-227-cp37-cp37m-win_amd64.whl", hash = "sha256:31f88a89139cb2adc40f8f0e65ee56a8c585f629974f9e07622ba80199057511"},
+    {file = "pywin32-227-cp38-cp38-win32.whl", hash = "sha256:7f18199fbf29ca99dff10e1f09451582ae9e372a892ff03a28528a24d55875bc"},
+    {file = "pywin32-227-cp38-cp38-win_amd64.whl", hash = "sha256:7c1ae32c489dc012930787f06244426f8356e129184a02c25aef163917ce158e"},
+    {file = "pywin32-227-cp39-cp39-win32.whl", hash = "sha256:c054c52ba46e7eb6b7d7dfae4dbd987a1bb48ee86debe3f245a2884ece46e295"},
+    {file = "pywin32-227-cp39-cp39-win_amd64.whl", hash = "sha256:f27cec5e7f588c3d1051651830ecc00294f90728d19c3bf6916e6dba93ea357c"},
+]
+requests = [
+    {file = "requests-2.24.0-py2.py3-none-any.whl", hash = "sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898"},
+    {file = "requests-2.24.0.tar.gz", hash = "sha256:b3559a131db72c33ee969480840fff4bb6dd111de7dd27c8ee1f820f4f00231b"},
+]
+six = [
+    {file = "six-1.15.0-py2.py3-none-any.whl", hash = "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"},
+    {file = "six-1.15.0.tar.gz", hash = "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259"},
+]
+urllib3 = [
+    {file = "urllib3-1.25.10-py2.py3-none-any.whl", hash = "sha256:e7983572181f5e1522d9c98453462384ee92a0be7fac5f1413a1e35c56cc0461"},
+    {file = "urllib3-1.25.10.tar.gz", hash = "sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a"},
+]
+websocket-client = [
+    {file = "websocket_client-0.57.0-py2.py3-none-any.whl", hash = "sha256:0fc45c961324d79c781bab301359d5a1b00b13ad1b10415a4780229ef71a5549"},
+    {file = "websocket_client-0.57.0.tar.gz", hash = "sha256:d735b91d6d1692a6a181f2a8c9e0238e5f6373356f561bb9dc4c7af36f452010"},
+]
diff --git a/tests/installation/fixtures/old-lock-refresh.test b/tests/installation/fixtures/old-lock-refresh.test
deleted file mode 100644
index 40e46ebdd3c..00000000000
--- a/tests/installation/fixtures/old-lock-refresh.test
+++ /dev/null
@@ -1,119 +0,0 @@
-[[package]]
-name = "attrs"
-version = "17.4.0"
-description = "Classes Without Boilerplate"
-category = "dev"
-optional = false
-python-versions = "*"
-
-[package.extras]
-dev = ["coverage", "hypothesis", "pympler", "pytest", "six", "zope.interface", "sphinx", "zope.interface"]
-docs = ["sphinx", "zope.interface"]
-tests = ["coverage", "hypothesis", "pympler", "pytest", "six", "zope.interface"]
-
-[[package]]
-name = "colorama"
-version = "0.3.9"
-description = "Cross-platform colored terminal text."
-category = "dev"
-optional = false
-python-versions = "*"
-
-[[package]]
-name = "funcsigs"
-version = "1.0.2"
-description = "Python function signatures from PEP362 for Python 2.6, 2.7 and 3.2+"
-category = "dev"
-optional = false
-python-versions = "*"
-
-[[package]]
-name = "more-itertools"
-version = "4.1.0"
-description = "More routines for operating on iterables, beyond itertools"
-category = "dev"
-optional = false
-python-versions = "*"
-
-[package.dependencies]
-six = ">=1.0.0,<2.0.0"
-
-[[package]]
-name = "pluggy"
-version = "0.6.0"
-description = "plugin and hook calling mechanisms for python"
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-
-[[package]]
-name = "py"
-version = "1.5.3"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-
-[[package]]
-name = "pytest"
-version = "3.5.0"
-description = "pytest: simple powerful testing with Python"
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-
-[package.dependencies]
-attrs = ">=17.4.0"
-colorama = "*"
-funcsigs = {version = "*", markers = "python_version < \"3.0\""}
-more-itertools = ">=4.0.0"
-pluggy = ">=0.5,<0.7"
-py = ">=1.5.0"
-six = ">=1.10.0"
-
-[[package]]
-name = "six"
-version = "1.11.0"
-description = "Python 2 and 3 compatibility utilities"
-category = "dev"
-optional = false
-python-versions = "*"
-
-[metadata]
-lock-version = "1.1"
-python-versions = "*"
-content-hash = "123456789"
-
-[metadata.files]
-attrs = [
-    {file = "attrs-17.4.0-py2.py3-none-any.whl", hash = "sha256:a17a9573a6f475c99b551c0e0a812707ddda1ec9653bed04c13841404ed6f450"},
-    {file = "attrs-17.4.0.tar.gz", hash = "sha256:1c7960ccfd6a005cd9f7ba884e6316b5e430a3f1a6c37c5f87d8b43f83b54ec9"},
-]
-colorama = [
-    {file = "colorama-0.3.9-py2.py3-none-any.whl", hash = "sha256:463f8483208e921368c9f306094eb6f725c6ca42b0f97e313cb5d5512459feda"},
-    {file = "colorama-0.3.9.tar.gz", hash = "sha256:48eb22f4f8461b1df5734a074b57042430fb06e1d61bd1e11b078c0fe6d7a1f1"},
-]
-funcsigs = [
-    {file = "funcsigs-1.0.2-py2.py3-none-any.whl", hash = "sha256:330cc27ccbf7f1e992e69fef78261dc7c6569012cf397db8d3de0234e6c937ca"},
-    {file = "funcsigs-1.0.2.tar.gz", hash = "sha256:a7bb0f2cf3a3fd1ab2732cb49eba4252c2af4240442415b4abce3b87022a8f50"},
-]
-more-itertools = [
-    {file = "more-itertools-4.1.0.tar.gz", hash = "sha256:c9ce7eccdcb901a2c75d326ea134e0886abfbea5f93e91cc95de9507c0816c44"},
-    {file = "more_itertools-4.1.0-py2-none-any.whl", hash = "sha256:11a625025954c20145b37ff6309cd54e39ca94f72f6bb9576d1195db6fa2442e"},
-    {file = "more_itertools-4.1.0-py3-none-any.whl", hash = "sha256:0dd8f72eeab0d2c3bd489025bb2f6a1b8342f9b198f6fc37b52d15cfa4531fea"},
-]
-pluggy = [
-    {file = "pluggy-0.6.0.tar.gz", hash = "sha256:7f8ae7f5bdf75671a718d2daf0a64b7885f74510bcd98b1a0bb420eb9a9d0cff"},
-]
-py = [
-    {file = "py-1.5.3-py2.py3-none-any.whl", hash = "sha256:983f77f3331356039fdd792e9220b7b8ee1aa6bd2b25f567a963ff1de5a64f6a"},
-    {file = "py-1.5.3.tar.gz", hash = "sha256:29c9fab495d7528e80ba1e343b958684f4ace687327e6f789a94bf3d1915f881"},
-]
-pytest = [
-    {file = "pytest-3.5.0-py2.py3-none-any.whl", hash = "sha256:6266f87ab64692112e5477eba395cfedda53b1933ccd29478e671e73b420c19c"},
-    {file = "pytest-3.5.0.tar.gz", hash = "sha256:fae491d1874f199537fd5872b5e1f0e74a009b979df9d53d1553fd03da1703e1"},
-]
-six = [
-    {file = "six-1.11.0-py2.py3-none-any.whl", hash = "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb"},
-    {file = "six-1.11.0.tar.gz", hash = "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9"},
-]
diff --git a/tests/installation/test_installer.py b/tests/installation/test_installer.py
index 95f98dad185..077f6dcab40 100644
--- a/tests/installation/test_installer.py
+++ b/tests/installation/test_installer.py
@@ -1772,44 +1772,6 @@ def test_installer_uses_prereleases_if_they_are_compatible(
     assert 2 == installer.executor.installations_count
 
 
-def test_installer_can_refresh_old_lock_files(locker, package, repo, installed, config):
-    pool = Pool()
-    pool.add_repository(repo)
-
-    locker.locked(True)
-    locker.mock_lock_data(fixture("old-lock"))
-
-    for pkg in locker.locked_repository(with_dev_reqs=True).packages:
-        dependency = Factory.create_dependency(
-            name=pkg.name,
-            constraint=pkg.to_dependency().constraint,
-            category=pkg.category,
-        )
-        package.add_dependency(dependency)
-        repo.add_package(pkg)
-
-    installer = Installer(
-        NullIO(),
-        MockEnv(),
-        package,
-        locker,
-        pool,
-        config,
-        installed=None,
-        executor=Executor(MockEnv(), pool, config, NullIO()),
-    )
-    installer.use_executor()
-
-    installer.lock(update=False)
-    installer.run()
-
-    assert 0 == installer.executor.installations_count
-    assert 0 == installer.executor.updates_count
-    assert 0 == installer.executor.removals_count
-
-    assert locker.written_data == fixture("old-lock-refresh")
-
-
 def test_installer_can_handle_old_lock_files(
     installer, locker, package, repo, installed, config
 ):