diff --git a/test_semver.py b/test_semver.py
index 1fd87ee6..015cb7d2 100644
--- a/test_semver.py
+++ b/test_semver.py
@@ -25,6 +25,7 @@
     parse_version_info,
     process,
     replace,
+    cmd_nextver,
 )
 
 SEMVERFUNCS = [
@@ -659,6 +660,8 @@ def test_should_not_allow_to_compare_version_with_int():
         v1 > 1
     with pytest.raises(TypeError):
         1 > v1
+    with pytest.raises(TypeError):
+        v1.compare(1)
 
 
 def test_should_compare_prerelease_with_numbers_and_letters():
@@ -911,6 +914,22 @@ def test_should_parse_cli_arguments(cli, expected):
         # check subcommand
         (cmd_check, Namespace(version="1.2.3"), does_not_raise(None)),
         (cmd_check, Namespace(version="1.2"), pytest.raises(ValueError)),
+        # nextver subcommand
+        (
+            cmd_nextver,
+            Namespace(version="1.2.3", part="major"),
+            does_not_raise("2.0.0"),
+        ),
+        (
+            cmd_nextver,
+            Namespace(version="1.2", part="major"),
+            pytest.raises(ValueError),
+        ),
+        (
+            cmd_nextver,
+            Namespace(version="1.2.3", part="nope"),
+            pytest.raises(ValueError),
+        ),
     ],
 )
 def test_should_process_parsed_cli_arguments(func, args, expectation):
@@ -1074,3 +1093,36 @@ def test_next_version_with_versioninfo(version, part, expected):
     next_version = ver.next_version(part)
     assert isinstance(next_version, VersionInfo)
     assert str(next_version) == expected
+
+
+@pytest.mark.parametrize(
+    "version, expected",
+    [
+        (
+            VersionInfo(major=1, minor=2, patch=3, prerelease=None, build=None),
+            "VersionInfo(major=1, minor=2, patch=3, prerelease=None, build=None)",
+        ),
+        (
+            VersionInfo(major=1, minor=2, patch=3, prerelease="r.1", build=None),
+            "VersionInfo(major=1, minor=2, patch=3, prerelease='r.1', build=None)",
+        ),
+        (
+            VersionInfo(major=1, minor=2, patch=3, prerelease="dev.1", build=None),
+            "VersionInfo(major=1, minor=2, patch=3, prerelease='dev.1', build=None)",
+        ),
+        (
+            VersionInfo(major=1, minor=2, patch=3, prerelease="dev.1", build="b.1"),
+            "VersionInfo(major=1, minor=2, patch=3, prerelease='dev.1', build='b.1')",
+        ),
+        (
+            VersionInfo(major=1, minor=2, patch=3, prerelease="r.1", build="b.1"),
+            "VersionInfo(major=1, minor=2, patch=3, prerelease='r.1', build='b.1')",
+        ),
+        (
+            VersionInfo(major=1, minor=2, patch=3, prerelease="r.1", build="build.1"),
+            "VersionInfo(major=1, minor=2, patch=3, prerelease='r.1', build='build.1')",
+        ),
+    ],
+)
+def test_repr(version, expected):
+    assert repr(version) == expected