diff --git a/test/parallel/test-crypto-x509.js b/test/parallel/test-crypto-x509.js
index 15e1f53bb05faf..bd906c25b9ee19 100644
--- a/test/parallel/test-crypto-x509.js
+++ b/test/parallel/test-crypto-x509.js
@@ -113,7 +113,7 @@ const der = Buffer.from(
     '5A:42:63:E0:21:2F:D6:70:63:07:96:6F:27:A7:78:12:08:02:7A:8B'
   );
   assert.strictEqual(x509.keyUsage, undefined);
-  assert.strictEqual(x509.serialNumber, '147D36C1C2F74206DE9FAB5F2226D78ADB00A426');
+  assert.strictEqual(x509.serialNumber.toUpperCase(), '147D36C1C2F74206DE9FAB5F2226D78ADB00A426');
 
   assert.deepStrictEqual(x509.raw, der);
 
@@ -255,6 +255,16 @@ oans248kpal88CGqsN2so/wZKxVnpiXlPHMdiNL7hRSUqlHkUi07FrP2Htg8kjI=
   });
   mc.port2.postMessage(x509);
 
+  const modulusOSSL = 'D456320AFB20D3827093DC2C4284ED04DFBABD56E1DDAE529E28B790CD42' +
+                      '56DB273349F3735FFD337C7A6363ECCA5A27B7F73DC7089A96C6D886DB0C' +
+                      '62388F1CDD6A963AFCD599D5800E587A11F908960F84ED50BA25A28303EC' +
+                      'DA6E684FBE7BAEDC9CE8801327B1697AF25097CEE3F175E400984C0DB6A8' +
+                      'EB87BE03B4CF94774BA56FFFC8C63C68D6ADEB60ABBE69A7B14AB6A6B9E7' +
+                      'BAA89B5ADAB8EB07897C07F6D4FA3D660DFF574107D28E8F63467A788624' +
+                      'C574197693E959CEA1362FFAE1BBA10C8C0D88840ABFEF103631B2E8F5C3' +
+                      '9B5548A7EA57E8A39F89291813F45A76C448033A2B7ED8403F4BAA147CF3' +
+                      '5E2D2554AA65CE49695797095BF4DC6B';
+
   // Verify that legacy encoding works
   const legacyObjectCheck = {
     subject: Object.assign({ __proto__: null }, {
@@ -279,15 +289,7 @@ oans248kpal88CGqsN2so/wZKxVnpiXlPHMdiNL7hRSUqlHkUi07FrP2Htg8kjI=
       'OCSP - URI': ['http://ocsp.nodejs.org/'],
       'CA Issuers - URI': ['http://ca.nodejs.org/ca.cert']
     }),
-    modulus: 'D456320AFB20D3827093DC2C4284ED04DFBABD56E1DDAE529E28B790CD42' +
-              '56DB273349F3735FFD337C7A6363ECCA5A27B7F73DC7089A96C6D886DB0C' +
-              '62388F1CDD6A963AFCD599D5800E587A11F908960F84ED50BA25A28303EC' +
-              'DA6E684FBE7BAEDC9CE8801327B1697AF25097CEE3F175E400984C0DB6A8' +
-              'EB87BE03B4CF94774BA56FFFC8C63C68D6ADEB60ABBE69A7B14AB6A6B9E7' +
-              'BAA89B5ADAB8EB07897C07F6D4FA3D660DFF574107D28E8F63467A788624' +
-              'C574197693E959CEA1362FFAE1BBA10C8C0D88840ABFEF103631B2E8F5C3' +
-              '9B5548A7EA57E8A39F89291813F45A76C448033A2B7ED8403F4BAA147CF3' +
-              '5E2D2554AA65CE49695797095BF4DC6B',
+    modulusPattern: new RegExp(`^${modulusOSSL}$`, 'i'),
     bits: 2048,
     exponent: '0x10001',
     valid_from: 'Sep  3 21:40:37 2022 GMT',
@@ -300,7 +302,7 @@ oans248kpal88CGqsN2so/wZKxVnpiXlPHMdiNL7hRSUqlHkUi07FrP2Htg8kjI=
       '51:62:18:39:E2:E2:77:F5:86:11:E8:C0:CA:54:43:7C:76:83:19:05:D0:03:' +
       '24:21:B8:EB:14:61:FB:24:16:EB:BD:51:1A:17:91:04:30:03:EB:68:5F:DC:' +
       '86:E1:D1:7C:FB:AF:78:ED:63:5F:29:9C:32:AF:A1:8E:22:96:D1:02',
-    serialNumber: '147D36C1C2F74206DE9FAB5F2226D78ADB00A426'
+    serialNumberPattern: /^147D36C1C2F74206DE9FAB5F2226D78ADB00A426$/i
   };
 
   const legacyObject = x509.toLegacyObject();
@@ -309,7 +311,7 @@ oans248kpal88CGqsN2so/wZKxVnpiXlPHMdiNL7hRSUqlHkUi07FrP2Htg8kjI=
   assert.deepStrictEqual(legacyObject.subject, legacyObjectCheck.subject);
   assert.deepStrictEqual(legacyObject.issuer, legacyObjectCheck.issuer);
   assert.deepStrictEqual(legacyObject.infoAccess, legacyObjectCheck.infoAccess);
-  assert.strictEqual(legacyObject.modulus, legacyObjectCheck.modulus);
+  assert.match(legacyObject.modulus, legacyObjectCheck.modulusPattern);
   assert.strictEqual(legacyObject.bits, legacyObjectCheck.bits);
   assert.strictEqual(legacyObject.exponent, legacyObjectCheck.exponent);
   assert.strictEqual(legacyObject.valid_from, legacyObjectCheck.valid_from);
@@ -318,9 +320,9 @@ oans248kpal88CGqsN2so/wZKxVnpiXlPHMdiNL7hRSUqlHkUi07FrP2Htg8kjI=
   assert.strictEqual(
     legacyObject.fingerprint256,
     legacyObjectCheck.fingerprint256);
-  assert.strictEqual(
+  assert.match(
     legacyObject.serialNumber,
-    legacyObjectCheck.serialNumber);
+    legacyObjectCheck.serialNumberPattern);
 }
 
 {