diff --git a/checks/migrations/0016_add_tlsrpt.py b/checks/migrations/0016_add_tlsrpt.py
index ce58c24d5..20740c46a 100644
--- a/checks/migrations/0016_add_tlsrpt.py
+++ b/checks/migrations/0016_add_tlsrpt.py
@@ -10,7 +10,7 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
-         migrations.AddField(
+        migrations.AddField(
             model_name="mailtestauth",
             name="tlsrpt_score",
             field=models.IntegerField(null=True),
diff --git a/checks/scoring.py b/checks/scoring.py
index 741f22ea1..e168fdcbd 100644
--- a/checks/scoring.py
+++ b/checks/scoring.py
@@ -236,7 +236,7 @@
 MAIL_AUTH_SPF_WORST_STATUS = STATUS_FAIL
 
 MAIL_AUTH_TLSRPT_PASS = NO_POINTS
-MAIL_AUTH_TLSRPT_FAIL = NO_POINTS    # TLS-RPT fail does not give a points penalty
+MAIL_AUTH_TLSRPT_FAIL = NO_POINTS  # TLS-RPT fail does not give a points penalty
 MAIL_AUTH_TLSRPT_ERROR = NO_POINTS
 MAIL_AUTH_TLSRPT_WORST_STATUS = STATUS_FAIL
 
diff --git a/checks/tasks/tlsrpt_parsing.py b/checks/tasks/tlsrpt_parsing.py
index e4ee47ad1..6616bc290 100644
--- a/checks/tasks/tlsrpt_parsing.py
+++ b/checks/tasks/tlsrpt_parsing.py
@@ -1,12 +1,12 @@
 # Copyright: 2022-2024, ECP, NLnet Labs, the Internet.nl contributors and SYS4 AG.
 # SPDX-License-Identifier: Apache-2.0
 
-'''
+"""
 SMTP TLS Reporting policy parser as defined by:
 
   RFC 8460, Section "3. Reporting Policy", see:
   https://datatracker.ietf.org/doc/html/rfc8460#section-3
-'''
+"""
 
 from pyparsing import (
     Literal,
@@ -23,14 +23,14 @@
 )
 
 
-WSP = White(ws=' ', exact=1).suppress()   # Whitespace
+WSP = White(ws=" ", exact=1).suppress()  # Whitespace
 
-field_delim = ZeroOrMore(WSP) + Literal(';') + ZeroOrMore(WSP)   # Fields are semicolon-delimited
-ura_delim = ZeroOrMore(WSP) + Literal(',') + ZeroOrMore(WSP)   # multiple RUAs are comma-delimited
+field_delim = ZeroOrMore(WSP) + Literal(";") + ZeroOrMore(WSP)  # Fields are semicolon-delimited
+ura_delim = ZeroOrMore(WSP) + Literal(",") + ZeroOrMore(WSP)  # multiple RUAs are comma-delimited
 
 tlsrpt_ext_name = Word(alphanums, alphanums + "_-.", max=32)
 tlsrpt_ext_value = Word(alphanums, alphanums + "_-.")
-tlsrpt_extension = ZeroOrMore(tlsrpt_ext_name + Literal('=') + tlsrpt_ext_value)
+tlsrpt_extension = ZeroOrMore(tlsrpt_ext_name + Literal("=") + tlsrpt_ext_value)
 
 # RegEx for parsing email.
 regex_tld = r"(?:[a-zA-Z]{2,63}|xn--[a-zA-Z0-9]+)"
@@ -38,8 +38,7 @@
     r"(?P<mailaddr>([a-zA-Z0-9]{0,61}@)?([a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+" r"" + regex_tld + ")"
 )
 mail_uri = Combine(CaselessLiteral("mailto:") + Regex(regex_mailaddr))
-tlsrpt_rua = Literal("rua=") + \
-    delimitedList(mail_uri | pyparsing_common.url, delim=',').setResultsName('tlsrpt_uri')
+tlsrpt_rua = Literal("rua=") + delimitedList(mail_uri | pyparsing_common.url, delim=",").setResultsName("tlsrpt_uri")
 
 tlsrpt_field = tlsrpt_rua + ZeroOrMore(field_delim + tlsrpt_extension)
 
diff --git a/checks/test/test_tlsrpt_parsing.py b/checks/test/test_tlsrpt_parsing.py
index a2436de7b..84cc21bc5 100644
--- a/checks/test/test_tlsrpt_parsing.py
+++ b/checks/test/test_tlsrpt_parsing.py
@@ -4,29 +4,29 @@
 def test_record_parse_simple_mailto():
     TXT_RECORD = "v=TLSRPTv1; rua=mailto:reports@example.com"
     parsed = tlsrpt_parsing.record.parseString(TXT_RECORD)
-    assert parsed.tlsrpt_version == 'v=TLSRPTv1'
-    assert parsed.tlsrpt_uri[0] == 'mailto:reports@example.com'
+    assert parsed.tlsrpt_version == "v=TLSRPTv1"
+    assert parsed.tlsrpt_uri[0] == "mailto:reports@example.com"
 
 
 def test_record_parse_multiple_mailto():
     TXT_RECORD = "v=TLSRPTv1;rua=mailto:reports@example.com,mailto:postmaster@example.com"
     parsed = tlsrpt_parsing.record.parseString(TXT_RECORD)
-    assert parsed.tlsrpt_version == 'v=TLSRPTv1'
-    assert parsed.tlsrpt_uri[0] == 'mailto:reports@example.com'
-    assert parsed.tlsrpt_uri[1] == 'mailto:postmaster@example.com'
+    assert parsed.tlsrpt_version == "v=TLSRPTv1"
+    assert parsed.tlsrpt_uri[0] == "mailto:reports@example.com"
+    assert parsed.tlsrpt_uri[1] == "mailto:postmaster@example.com"
 
 
 def test_record_parse_simple_https():
     TXT_RECORD = "v=TLSRPTv1; rua=https://reporting.example.com/v1/tlsrpt"
     parsed = tlsrpt_parsing.record.parseString(TXT_RECORD)
-    assert parsed.tlsrpt_version == 'v=TLSRPTv1'
-    assert parsed.tlsrpt_uri[0] == 'https://reporting.example.com/v1/tlsrpt'
+    assert parsed.tlsrpt_version == "v=TLSRPTv1"
+    assert parsed.tlsrpt_uri[0] == "https://reporting.example.com/v1/tlsrpt"
 
 
 def test_record_parse_with_extension():
     TXT_RECORD = "v=TLSRPTv1; rua=https://reporting.example.com/v1/tlsrpt; ext=extvalue"
     parsed = tlsrpt_parsing.record.parseString(TXT_RECORD)
-    assert parsed.tlsrpt_version == 'v=TLSRPTv1'
+    assert parsed.tlsrpt_version == "v=TLSRPTv1"
 
 
 def test_parse_silent():
@@ -34,6 +34,6 @@ def test_parse_silent():
     Check that parse_silent does not throw a ParseException but instead returns
     None if the TLSRPT policy record is malformed.
     """
-    TXT_RECORD = "v=TLSRPTv1; rua=!!"   # broken TLSRPT
+    TXT_RECORD = "v=TLSRPTv1; rua=!!"  # broken TLSRPT
     parsed = tlsrpt_parsing.parse_silent(TXT_RECORD)
     assert parsed is None