diff --git a/src/diagnosers/14-ports.py b/src/diagnosers/14-ports.py
index 2d7eee717..1483dbb96 100644
--- a/src/diagnosers/14-ports.py
+++ b/src/diagnosers/14-ports.py
@@ -47,7 +47,7 @@ class MyDiagnoser(Diagnoser):
 
         ipversions = []
         ipv4 = Diagnoser.get_cached_report("ip", item={"test": "ipv4"}) or {}
-        if ipv4.get("status") == "SUCCESS" or not settings_get("dns_exposure") == "ipv6":
+        if ipv4.get("status") == "SUCCESS" or settings_get("dns_exposure") != "ipv6":
             ipversions.append(4)
 
         # To be discussed: we could also make this check dependent on the
@@ -121,7 +121,7 @@ class MyDiagnoser(Diagnoser):
                         for record in dnsrecords.get("items", [])
                     )
 
-                if failed == 4 and not settings_get("dns_exposure") == "ipv6" or ipv6_is_important():
+                if failed == 4 and settings_get("dns_exposure") != "ipv6" or ipv6_is_important():
                     yield dict(
                         meta={"port": port},
                         data={
diff --git a/src/diagnosers/21-web.py b/src/diagnosers/21-web.py
index eaac0d25f..f62d182bc 100644
--- a/src/diagnosers/21-web.py
+++ b/src/diagnosers/21-web.py
@@ -77,7 +77,7 @@ class MyDiagnoser(Diagnoser):
 
         ipversions = []
         ipv4 = Diagnoser.get_cached_report("ip", item={"test": "ipv4"}) or {}
-        if ipv4.get("status") == "SUCCESS" and not settings_get("dns_exposure") == "ipv6":
+        if ipv4.get("status") == "SUCCESS" and settings_get("dns_exposure") != "ipv6":
             ipversions.append(4)
 
         # To be discussed: we could also make this check dependent on the
diff --git a/src/dns.py b/src/dns.py
index 31c91d590..a007f69be 100644
--- a/src/dns.py
+++ b/src/dns.py
@@ -186,7 +186,7 @@ def _build_dns_conf(base_domain, include_empty_AAAA_if_no_ipv6=False):
         ###########################
         # Basic ipv4/ipv6 records #
         ###########################
-        if ipv4 and not settings_get("dns_exposure") == "ipv6":
+        if ipv4 and settings_get("dns_exposure") != "ipv6":
             basic.append([basename, ttl, "A", ipv4])
 
         if ipv6: