diff --git a/docs/api.md b/docs/api.md
index d8b6c81eac8ba..bc29b31fea5a7 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -311,6 +311,7 @@
 - [class: SecurityDetails](#class-securitydetails)
   * [securityDetails.issuer()](#securitydetailsissuer)
   * [securityDetails.protocol()](#securitydetailsprotocol)
+  * [securityDetails.subjectAlternativeNames()](#securitydetailssubjectalternativenames)
   * [securityDetails.subjectName()](#securitydetailssubjectname)
   * [securityDetails.validFrom()](#securitydetailsvalidfrom)
   * [securityDetails.validTo()](#securitydetailsvalidto)
@@ -3729,6 +3730,9 @@ Contains the URL of the response.
 #### securityDetails.protocol()
 - returns: <[string]> String with the security protocol, eg. "TLS 1.2".
 
+#### securityDetails.subjectAlternativeNames()
+- returns: <[Array]<[string]>> Returns the list of SANs (subject alternative names) of the certificate.
+
 #### securityDetails.subjectName()
 - returns: <[string]> Name of the subject to which the certificate was issued to.
 
diff --git a/src/SecurityDetails.ts b/src/SecurityDetails.ts
index fb7a450566f57..ccebcdc988c36 100644
--- a/src/SecurityDetails.ts
+++ b/src/SecurityDetails.ts
@@ -20,6 +20,7 @@ export class SecurityDetails {
   private _validFrom: number;
   private _validTo: number;
   private _protocol: string;
+  private _sanList: string[];
 
   constructor(securityPayload: Protocol.Network.SecurityDetails) {
     this._subjectName = securityPayload.subjectName;
@@ -27,6 +28,7 @@ export class SecurityDetails {
     this._validFrom = securityPayload.validFrom;
     this._validTo = securityPayload.validTo;
     this._protocol = securityPayload.protocol;
+    this._sanList = securityPayload.sanList;
   }
 
   subjectName(): string {
@@ -48,4 +50,8 @@ export class SecurityDetails {
   protocol(): string {
     return this._protocol;
   }
+
+  subjectAlternativeNames(): string[] {
+    return this._sanList;
+  }
 }
diff --git a/test/ignorehttpserrors.spec.js b/test/ignorehttpserrors.spec.js
index 648979be5bc82..d4871b90450d8 100644
--- a/test/ignorehttpserrors.spec.js
+++ b/test/ignorehttpserrors.spec.js
@@ -64,8 +64,12 @@ describeFailsFirefox('ignoreHTTPSErrors', function () {
       const protocol = serverRequest.socket.getProtocol().replace('v', ' ');
       expect(securityDetails.protocol()).toBe(protocol);
       expect(securityDetails.subjectName()).toBe('puppeteer-tests');
-      expect(securityDetails.validFrom()).toBe(1550084863);
-      expect(securityDetails.validTo()).toBe(33086084863);
+      expect(securityDetails.validFrom()).toBe(1589357069);
+      expect(securityDetails.validTo()).toBe(1904717069);
+      expect(securityDetails.subjectAlternativeNames()).toEqual([
+        'www.puppeteer-tests.test',
+        'www.puppeteer-tests-1.test',
+      ]);
     });
     it('should be |null| for non-secure requests', async () => {
       const { server } = getTestState();
diff --git a/utils/testserver/cert.pem b/utils/testserver/cert.pem
index fc692a66415bc..fd3838535aa81 100644
--- a/utils/testserver/cert.pem
+++ b/utils/testserver/cert.pem
@@ -1,28 +1,20 @@
 -----BEGIN CERTIFICATE-----
-MIIEsjCCApoCCQCIPLvQDgoZojANBgkqhkiG9w0BAQsFADAaMRgwFgYDVQQDDA9w
-dXBwZXRlZXItdGVzdHMwIBcNMTkwMjEzMTkwNzQzWhgPMzAxODA2MTYxOTA3NDNa
-MBoxGDAWBgNVBAMMD3B1cHBldGVlci10ZXN0czCCAiIwDQYJKoZIhvcNAQEBBQAD
-ggIPADCCAgoCggIBAJue1yqA4qn0SJR3rgTd6sCYVHMKqUouD0No09H7qf+5ZaIb
-3yGpC5J9Bsf/ZbvD5xpgqbGEYkHj7Qh6Z/cPCSHA+ZpsUzDXVrLFXrdwwiK1FrIS
-rDI2RYsiP+e52XPC/acWC/7f+E54C62oMjYojaVaDn8gu06gyS1rXK2JITQ6CrKn
-b+PVSkjtPB4ku245u1qCKoblkNEZSkEmw8Csl+gw6ydGqOSQAoo8rsDte5zCMnPX
-7XzL6EhRqpiVx7PCuQWnXhL7j9N214Pit7s7F8TeAA6yZR9oswW+h0dWO+XwocJ1
-rwkODXOngbCqO+GUxyuavIl2m0d2MP8n6Wa9RVqYetmPQzafKkR5hjiV4mgCFqNQ
-bHMTjI6udcR+h5pYoWKxN9/gJaWwyAAzck0AiMeGVrvKR3JKACqlTMzy/Y30obRF
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-3Taaccm+
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+cy0xLnRlc3QwDQYJKoZIhvcNAQELBQADggEBAI1qp5ZppV1R3e8XxzwwkFDPFN8W
+Pe3AoqhAKyJnJl1NUn9q3sroEeSQRhODWUHCd7lENzhsT+3mzonNNkN9B/hq0rpK
+KHHczXILDqdyuxH3LxQ1VHGE8VN2NbdkfobtzAsA3woiJxOuGeusXJnKB4kJQeIP
+V+BMEZWeaSDC2PREkG7GOezmE1/WDUCYaorPw2whdCA5wJvTW3zXpJjYhfsld+5z
+KuErx4OCxRJij73/BD9SpLxDEY1cdl819F1IvxsRGhmTIaSly2hQLrhOgo1jgZtV
+FGCa6DSlXnQGLaV+N+ssR0lkCksNrNBVDfA1bP5bT/4VCcwUWwm9TUeF0Qo=
 -----END CERTIFICATE-----
diff --git a/utils/testserver/key.pem b/utils/testserver/key.pem
index e2ed680559f5c..cbc3acb2294ca 100644
--- a/utils/testserver/key.pem
+++ b/utils/testserver/key.pem
@@ -1,52 +1,28 @@
 -----BEGIN PRIVATE KEY-----
-MIIJQwIBADANBgkqhkiG9w0BAQEFAASCCS0wggkpAgEAAoICAQCbntcqgOKp9EiU
-d64E3erAmFRzCqlKLg9DaNPR+6n/uWWiG98hqQuSfQbH/2W7w+caYKmxhGJB4+0I
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+gupVbY1mQ1GTPByxHeLh1w==
 -----END PRIVATE KEY-----