diff --git net/http/transport_security_state.cc net/http/transport_security_state.cc
index b7a2bca7bf42..5987ee212a12 100644
--- net/http/transport_security_state.cc
+++ net/http/transport_security_state.cc
@@ -1100,8 +1100,12 @@ void TransportSecurityState::ClearReportCachesForTesting() {
   sent_expect_ct_reports_cache_.Clear();
 }
 
-// static
-bool TransportSecurityState::IsBuildTimely() {
+// Returns true if the current build is recent enough to ensure that
+// built-in security information (e.g. CT Logs) is fresh enough.
+bool TransportSecurityState::IsBuildTimely() const {
+  if (!enforce_net_security_expiration_)
+    return true;
+
   const base::Time build_time = base::GetBuildTime();
   // We consider built-in information to be timely for 10 weeks.
   return (base::Time::Now() - build_time).InDays() < 70 /* 10 weeks */;
diff --git net/http/transport_security_state.h net/http/transport_security_state.h
index 48ccb74e2e1d..79dc9958d1de 100644
--- net/http/transport_security_state.h
+++ net/http/transport_security_state.h
@@ -530,6 +530,10 @@ class NET_EXPORT TransportSecurityState {
   void EnableStaticPinsForTesting() { enable_static_pins_ = true; }
   bool has_dynamic_pkp_state() const { return !enabled_pkp_hosts_.empty(); }
 
+  void set_enforce_net_security_expiration(bool enforce) {
+    enforce_net_security_expiration_ = enforce;
+  }
+
  private:
   friend class TransportSecurityStateTest;
   friend class TransportSecurityStateStaticFuzzer;
@@ -548,7 +552,7 @@ class NET_EXPORT TransportSecurityState {
   // IsBuildTimely returns true if the current build is new enough ensure that
   // built in security information (i.e. HSTS preloading and pinning
   // information) is timely.
-  static bool IsBuildTimely();
+  bool IsBuildTimely() const;
 
   // Helper method for actually checking pins.
   PKPStatus CheckPublicKeyPinsImpl(
@@ -646,6 +650,8 @@ class NET_EXPORT TransportSecurityState {
   // True if public key pinning bypass is enabled for local trust anchors.
   bool enable_pkp_bypass_for_local_trust_anchors_;
 
+  bool enforce_net_security_expiration_ = true;
+
   ExpectCTReporter* expect_ct_reporter_ = nullptr;
 
   RequireCTDelegate* require_ct_delegate_ = nullptr;