diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index cc1858a08c..b56d6cb369 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -10,14 +10,14 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11", '3.12']
+        python-version: [3.8, 3.9, "3.10", "3.11", '3.12']
         experimental: [false]
         include:
           - os: macos-latest
             experimental: true
-            python-version: 3.7
+            python-version: "3.12"
           - os: windows-latest
-            python-version: 3.7
+            python-version: "3.12"
             experimental: true
 # See https://github.com/actions/toolkit/issues/399
 #        include:
diff --git a/breezy/builtins.py b/breezy/builtins.py
index 83dd050e18..d369d59eaf 100644
--- a/breezy/builtins.py
+++ b/breezy/builtins.py
@@ -4755,17 +4755,6 @@ def run(
         lsprof_tests=False,
         sync=False,
     ):
-        # During selftest, disallow proxying, as it can cause severe
-        # performance penalties and is only needed for thread
-        # safety. The selftest command is assumed to not use threads
-        # too heavily. The call should be as early as possible, as
-        # error reporting for past duplicate imports won't have useful
-        # backtraces.
-        if sys.version_info[0] < 3:
-            # TODO(pad.lv/1696545): Allow proxying on Python 3, since
-            # disallowing it currently leads to failures in many places.
-            lazy_import.disallow_proxying()
-
         try:
             from . import tests
         except ImportError as exc:
diff --git a/breezy/export_pot.py b/breezy/export_pot.py
index 512d717664..b37339db20 100644
--- a/breezy/export_pot.py
+++ b/breezy/export_pot.py
@@ -81,9 +81,7 @@ def _parse_source(source_text, filename="<unknown>"):
             # string terminates on. It's more useful to have the line the
             # string begins on. Unfortunately, counting back newlines is
             # only an approximation as the AST is ignorant of escaping.
-            str_to_lineno[node.s] = node.lineno - (
-                0 if sys.version_info >= (3, 8) else node.s.count("\n")
-            )
+            str_to_lineno[node.s] = node.lineno
     return cls_to_lineno, str_to_lineno
 
 
diff --git a/breezy/tests/blackbox/test_locale.py b/breezy/tests/blackbox/test_locale.py
index adb3e01df4..64d6b4a2ce 100644
--- a/breezy/tests/blackbox/test_locale.py
+++ b/breezy/tests/blackbox/test_locale.py
@@ -86,70 +86,6 @@ def test_log_coerced_utf8(self):
             out,
         )
 
-    @unittest.skipIf(
-        sys.version_info[:2] >= (3, 8),
-        "python > 3.8 doesn't allow changing filesystem default encoding",
-    )
-    def test_log_C(self):
-        self.disable_missing_extensions_warning()
-        out, err = self.run_log_quiet_long(
-            ["tree"],
-            # C is not necessarily the default locale, so set both LANG and
-            # LC_ALL explicitly because LC_ALL is preferred on (some?) Linux
-            # systems but only LANG is respected on Windows.
-            env_changes={
-                "LANG": "C",
-                "LC_ALL": "C",
-                "LC_CTYPE": None,
-                "LANGUAGE": None,
-                "PYTHONCOERCECLOCALE": "0",
-                "PYTHONUTF8": "0",
-            },
-        )
-        self.assertEqual(b"", err)
-        self.assertEqualDiff(
-            b"""\
-------------------------------------------------------------
-revno: 1
-committer: ???? Meinel <juju@info.com>
-branch nick: tree
-timestamp: Thu 2006-08-24 20:28:17 +0000
-message:
-  Unicode ? commit
-""",
-            out,
-        )
-
-    @unittest.skipIf(
-        sys.version_info[:2] >= (3, 8),
-        "python > 3.8 doesn't allow changing filesystem default encoding",
-    )
-    def test_log_BOGUS(self):
-        out, err = self.run_log_quiet_long(
-            ["tree"],
-            env_changes={
-                "LANG": "BOGUS",
-                "LC_ALL": None,
-                "LC_CTYPE": None,
-                "LANGUAGE": None,
-                "PYTHONCOERCECLOCALE": "0",
-                "PYTHONUTF8": "0",
-            },
-        )
-        self.assertStartsWith(err, b"brz: WARNING: Error: unsupported locale setting")
-        self.assertEqualDiff(
-            b"""\
-------------------------------------------------------------
-revno: 1
-committer: ???? Meinel <juju@info.com>
-branch nick: tree
-timestamp: Thu 2006-08-24 20:28:17 +0000
-message:
-  Unicode ? commit
-""",
-            out,
-        )
-
 
 class TestMultibyteCodecs(tests.TestCaseWithTransport):
     """Tests for quirks of multibyte encodings and their python codecs."""
diff --git a/breezy/tests/test_export_pot.py b/breezy/tests/test_export_pot.py
index 7723850530..4b0948e9a0 100644
--- a/breezy/tests/test_export_pot.py
+++ b/breezy/tests/test_export_pot.py
@@ -133,17 +133,9 @@ def test_strings_multiline_escapes(self):
     )
 """
         _, str_lines = export_pot._parse_source(src)
-        if sys.version_info < (3, 8):
-            self.expectFailure(
-                "Escaped newlines confuses the multiline handling",
-                self.assertNotEqual,
-                str_lines,
-                {"Escaped\n": 0, "Raw\\n": 2, "A\n\nB\n\nC\n\n": -2},
-            )
-        else:
-            self.assertEqual(
-                str_lines, {"Escaped\n": 1, "Raw\\n": 2, "A\n\nB\n\nC\n\n": 4}
-            )
+        self.assertEqual(
+            str_lines, {"Escaped\n": 1, "Raw\\n": 2, "A\n\nB\n\nC\n\n": 4}
+        )
 
 
 class TestModuleContext(tests.TestCase):
diff --git a/pyproject.toml b/pyproject.toml
index e7784ca33c..618366f692 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ classifiers = [
     "Programming Language :: C",
     "Topic :: Software Development :: Version Control",
 ]
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 dependencies = [
     "configobj",
     "fastbencode",