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diff --git a/tests/test_validations.py b/tests/test_validations.py
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+# -*- coding: utf-8 -*-
+# wikiget - CLI tool for downloading files from Wikimedia sites
+# Copyright (C) 2018-2021 Cody Logan
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# Wikiget is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Wikiget is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Wikiget. If not, see <https://www.gnu.org/licenses/>.
+
+from wikiget.validations import valid_file, valid_site, verify_hash
+
+
+def test_invalid_site_input():
+    """
+    Invalid site strings should not return regex match objects.
+    """
+    invalid_input = ["example.com", "vim.wikia.com",
+                     "en.wikipedia.com", "en.wikimpedia.org"]
+    for i in invalid_input:
+        site_match = valid_site(i)
+        assert site_match is None
+
+
+def test_valid_site_input():
+    """
+    Valid site strings should return regex match objects.
+    """
+    valid_input = ["en.wikipedia.org", "commons.wikimedia.org",
+                   "de.wikipedia.org", "meta.wikimedia.org"]
+    for i in valid_input:
+        site_match = valid_site(i)
+        assert site_match is not None
+
+
+def test_file_regex():
+    """
+    File regex should return a match object with match groups corresponding
+    to the file prefix and name.
+    """
+    i = "File:Example.jpg"
+    file_match = valid_file(i)
+    assert file_match is not None
+    assert file_match.group(0) == "File:Example.jpg"  # entire match
+    assert file_match.group(1) == "File:"             # first group
+    assert file_match.group(2) == "Example.jpg"       # second group
+
+
+def test_invalid_file_input():
+    """
+    Invalid file strings should not return regex match objects.
+    """
+    invalid_input = ["file:example", "example.jpg", "Foo Bar.gif",
+                     "Fil:Example.jpg"]
+    for i in invalid_input:
+        file_match = valid_file(i)
+        assert file_match is None
+
+
+def test_valid_file_input():
+    """
+    Valid file strings should return regex match objects.
+    """
+    valid_input = ["Image:example.jpg", "file:example.jpg",
+                   "File:example.file-01.jpg", "FILE:FOO.BMP",
+                   "File:ß handwritten sample.gif", "File:A (1).jpeg"]
+    for i in valid_input:
+        file_match = valid_file(i)
+        assert file_match is not None
+
+
+def test_verify_hash(tmp_path):
+    """
+    Confirm that verify_hash returns the proper SHA1 hash.
+    """
+    file_name = "testfile"
+    file_contents = "foobar"
+    file_sha1 = "8843d7f92416211de9ebb963ff4ce28125932878"
+
+    tmp_file = tmp_path / file_name
+    tmp_file.write_text(file_contents)
+
+    assert verify_hash(tmp_file) == file_sha1