diff --git a/dvc/api.py b/dvc/api.py
index bf976dcf0..8da4cf6ba 100644
--- a/dvc/api.py
+++ b/dvc/api.py
@@ -15,7 +15,7 @@ def get_url(path, repo=None, rev=None, remote=None):
     """Returns an url of a resource specified by path in repo"""
     with _make_repo(repo, rev=rev) as _repo:
         abspath = os.path.join(_repo.root_dir, path)
-        out, = _repo.find_outs_by_path(abspath)
+        (out,) = _repo.find_outs_by_path(abspath)
         remote_obj = _repo.cloud.get_remote(remote)
         return str(remote_obj.checksum_to_path_info(out.checksum))
 
diff --git a/dvc/repo/__init__.py b/dvc/repo/__init__.py
index 8a0afc2d3..94f792880 100644
--- a/dvc/repo/__init__.py
+++ b/dvc/repo/__init__.py
@@ -263,7 +263,7 @@ class Repo(object):
 
             for stage in stages:
                 if stage.is_repo_import:
-                    dep, = stage.deps
+                    (dep,) = stage.deps
                     cache.external[dep.repo_pair].add(dep.def_path)
                     continue
 
@@ -445,7 +445,7 @@ class Repo(object):
 
     def find_out_by_relpath(self, relpath):
         path = os.path.join(self.root_dir, relpath)
-        out, = self.find_outs_by_path(path)
+        (out,) = self.find_outs_by_path(path)
         return out
 
     def is_dvc_internal(self, path):
@@ -457,7 +457,7 @@ class Repo(object):
         """Opens a specified resource as a file descriptor"""
         cause = None
         try:
-            out, = self.find_outs_by_path(path)
+            (out,) = self.find_outs_by_path(path)
         except OutputNotFoundError as e:
             out = None
             cause = e
diff --git a/dvc/repo/get_url.py b/dvc/repo/get_url.py
index fbc173b64..5718b20ec 100644
--- a/dvc/repo/get_url.py
+++ b/dvc/repo/get_url.py
@@ -14,6 +14,6 @@ def get_url(url, out=None):
 
     out = os.path.abspath(out)
 
-    dep, = dependency.loads_from(None, [url])
-    out, = output.loads_from(None, [out], use_cache=False)
+    (dep,) = dependency.loads_from(None, [url])
+    (out,) = output.loads_from(None, [out], use_cache=False)
     dep.download(out)
diff --git a/setup.py b/setup.py
index 29a4a0936..81dadf1cb 100644
--- a/setup.py
+++ b/setup.py
@@ -141,7 +141,7 @@ tests_requirements = [
 ]
 
 if (sys.version_info) >= (3, 6):
-    tests_requirements.append("black==19.3b0")
+    tests_requirements.append("black==19.10b0")
 
 setup(
     name="dvc",
diff --git a/tests/func/test_add.py b/tests/func/test_add.py
index 8a76263da..bbb4fc4bf 100644
--- a/tests/func/test_add.py
+++ b/tests/func/test_add.py
@@ -32,7 +32,7 @@ from tests.utils import spy
 
 
 def test_add(tmp_dir, dvc):
-    stage, = tmp_dir.dvc_gen({"foo": "foo"})
+    (stage,) = tmp_dir.dvc_gen({"foo": "foo"})
     md5, _ = file_md5("foo")
 
     assert stage is not None
@@ -50,7 +50,7 @@ def test_add_unicode(tmp_dir, dvc):
     with open("\xe1", "wb") as fd:
         fd.write("something".encode("utf-8"))
 
-    stage, = dvc.add("\xe1")
+    (stage,) = dvc.add("\xe1")
 
     assert os.path.isfile(stage.path)
 
@@ -61,7 +61,7 @@ def test_add_unsupported_file(dvc):
 
 
 def test_add_directory(tmp_dir, dvc):
-    stage, = tmp_dir.dvc_gen({"dir": {"file": "file"}})
+    (stage,) = tmp_dir.dvc_gen({"dir": {"file": "file"}})
 
     assert stage is not None
     assert len(stage.deps) == 0
@@ -162,7 +162,7 @@ def test_add_file_in_dir(tmp_dir, dvc):
     tmp_dir.gen({"dir": {"subdir": {"subdata": "subdata content"}}})
     subdir_path = os.path.join("dir", "subdir", "subdata")
 
-    stage, = dvc.add(subdir_path)
+    (stage,) = dvc.add(subdir_path)
 
     assert stage is not None
     assert len(stage.deps) == 0
diff --git a/tests/func/test_api.py b/tests/func/test_api.py
index 54623c080..b6ddc9dd5 100644
--- a/tests/func/test_api.py
+++ b/tests/func/test_api.py
@@ -101,7 +101,7 @@ def _set_remote_url_and_commit(repo, remote_url):
 
 # FIXME: this test doesn't use scm ;D
 def test_open_scm_controlled(dvc_repo, repo_dir):
-    stage, = dvc_repo.add(repo_dir.FOO)
+    (stage,) = dvc_repo.add(repo_dir.FOO)
 
     stage_content = open(stage.path, "r").read()
     with api.open(stage.path) as fd:
diff --git a/tests/func/test_commit.py b/tests/func/test_commit.py
index 8d6a8e57d..85c3623b5 100644
--- a/tests/func/test_commit.py
+++ b/tests/func/test_commit.py
@@ -20,7 +20,7 @@ def test_commit_recursive(tmp_dir, dvc):
 
 def test_commit_force(tmp_dir, dvc):
     tmp_dir.gen({"dir": {"file": "text1", "file2": "text2"}})
-    stage, = dvc.add("dir", no_commit=True)
+    (stage,) = dvc.add("dir", no_commit=True)
 
     with dvc.state:
         assert stage.outs[0].changed_cache()
@@ -42,7 +42,7 @@ def test_commit_force(tmp_dir, dvc):
 
 def test_commit_with_deps(tmp_dir, dvc, run_copy):
     tmp_dir.gen("foo", "foo")
-    foo_stage, = dvc.add("foo", no_commit=True)
+    (foo_stage,) = dvc.add("foo", no_commit=True)
     assert foo_stage is not None
     assert len(foo_stage.outs) == 1
 
@@ -62,7 +62,7 @@ def test_commit_with_deps(tmp_dir, dvc, run_copy):
 
 def test_commit_changed_md5(tmp_dir, dvc):
     tmp_dir.gen({"file": "file content"})
-    stage, = dvc.add("file", no_commit=True)
+    (stage,) = dvc.add("file", no_commit=True)
 
     stage_file_content = load_stage_file(stage.path)
     stage_file_content["md5"] = "1111111111"
diff --git a/tests/func/test_gc.py b/tests/func/test_gc.py
index 7d06cb9a3..2fb46eb0c 100644
--- a/tests/func/test_gc.py
+++ b/tests/func/test_gc.py
@@ -192,7 +192,7 @@ def test_all_commits(tmp_dir, scm, dvc):
 
 def test_gc_no_dir_cache(tmp_dir, dvc, repo_template):
     dvc.add(["foo", "bar"])
-    dir_stage, = dvc.add("dir")
+    (dir_stage,) = dvc.add("dir")
 
     os.unlink(dir_stage.outs[0].cache_path)
 
diff --git a/tests/func/test_stage.py b/tests/func/test_stage.py
index b87a32d76..d4e9e8b97 100644
--- a/tests/func/test_stage.py
+++ b/tests/func/test_stage.py
@@ -155,7 +155,7 @@ class TestExternalRemoteResolution(TestDvc):
 
 
 def test_md5_ignores_comments(repo_dir, dvc_repo):
-    stage, = dvc_repo.add("foo")
+    (stage,) = dvc_repo.add("foo")
 
     with open(stage.path, "a") as f:
         f.write("# End comment\n")
@@ -165,7 +165,7 @@ def test_md5_ignores_comments(repo_dir, dvc_repo):
 
 
 def test_meta_is_preserved(dvc_repo):
-    stage, = dvc_repo.add("foo")
+    (stage,) = dvc_repo.add("foo")
 
     # Add meta to DVC-file
     data = load_stage_file(stage.path)
diff --git a/tests/unit/test_repo.py b/tests/unit/test_repo.py
index aafec4de0..2e0720a45 100644
--- a/tests/unit/test_repo.py
+++ b/tests/unit/test_repo.py
@@ -12,8 +12,8 @@ def test_is_dvc_internal(tmp_dir, dvc):
 def test_destroy(tmp_dir, dvc):
     dvc.config.set("cache", "type", "symlink")
 
-    tmp_dir.dvc_gen('file', 'text')
-    tmp_dir.dvc_gen({'dir': {'file': 'lorem', 'subdir/file': 'ipsum'}})
+    tmp_dir.dvc_gen("file", "text")
+    tmp_dir.dvc_gen({"dir": {"file": "lorem", "subdir/file": "ipsum"}})
 
     dvc.destroy()