diff --git a/test/parallel/test-tls-cert-chains-concat.js b/test/parallel/test-tls-cert-chains-concat.js
index 7802d8ecb49ddb..ffb29cf5aae2c7 100644
--- a/test/parallel/test-tls-cert-chains-concat.js
+++ b/test/parallel/test-tls-cert-chains-concat.js
@@ -25,7 +25,7 @@ connect({
   assert.strictEqual(peer.subject.emailAddress, 'adam.lippai@tresorit.com');
   assert.strictEqual(peer.subject.CN, 'Ádám Lippai');
   assert.strictEqual(peer.issuer.CN, 'ca3');
-  assert.strictEqual(peer.serialNumber, '5B75D77EDC7FB5B7FA9F1424DA4C64FB815DCBDE');
+  assert.match(peer.serialNumber, /5B75D77EDC7FB5B7FA9F1424DA4C64FB815DCBDE/i);
 
   const next = pair.client.conn.getPeerCertificate(true).issuerCertificate;
   const root = next.issuerCertificate;
@@ -33,12 +33,12 @@ connect({
   debug('next:\n', next);
   assert.strictEqual(next.subject.CN, 'ca3');
   assert.strictEqual(next.issuer.CN, 'ca1');
-  assert.strictEqual(next.serialNumber, '147D36C1C2F74206DE9FAB5F2226D78ADB00A425');
+  assert.match(next.serialNumber, /147D36C1C2F74206DE9FAB5F2226D78ADB00A425/i);
 
   debug('root:\n', root);
   assert.strictEqual(root.subject.CN, 'ca1');
   assert.strictEqual(root.issuer.CN, 'ca1');
-  assert.strictEqual(root.serialNumber, '4AB16C8DFD6A7D0D2DFCABDF9C4B0E92C6AD0229');
+  assert.match(root.serialNumber, /4AB16C8DFD6A7D0D2DFCABDF9C4B0E92C6AD0229/i);
 
   // No client cert, so empty object returned.
   assert.deepStrictEqual(pair.server.conn.getPeerCertificate(), {});
diff --git a/test/parallel/test-tls-cert-chains-in-ca.js b/test/parallel/test-tls-cert-chains-in-ca.js
index b38058c794739e..8b4cbac36c2902 100644
--- a/test/parallel/test-tls-cert-chains-in-ca.js
+++ b/test/parallel/test-tls-cert-chains-in-ca.js
@@ -30,16 +30,16 @@ connect({
 
   const peer = pair.client.conn.getPeerCertificate();
   debug('peer:\n', peer);
-  assert.strictEqual(peer.serialNumber, '5B75D77EDC7FB5B7FA9F1424DA4C64FB815DCBDE');
+  assert.match(peer.serialNumber, /5B75D77EDC7FB5B7FA9F1424DA4C64FB815DCBDE/i);
 
   const next = pair.client.conn.getPeerCertificate(true).issuerCertificate;
   const root = next.issuerCertificate;
   delete next.issuerCertificate;
   debug('next:\n', next);
-  assert.strictEqual(next.serialNumber, '147D36C1C2F74206DE9FAB5F2226D78ADB00A425');
+  assert.match(next.serialNumber, /147D36C1C2F74206DE9FAB5F2226D78ADB00A425/i);
 
   debug('root:\n', root);
-  assert.strictEqual(root.serialNumber, '4AB16C8DFD6A7D0D2DFCABDF9C4B0E92C6AD0229');
+  assert.match(root.serialNumber, /4AB16C8DFD6A7D0D2DFCABDF9C4B0E92C6AD0229/i);
 
   return cleanup();
 });
diff --git a/test/parallel/test-tls-empty-sni-context.js b/test/parallel/test-tls-empty-sni-context.js
index cb76430f65330f..87219976a1ebda 100644
--- a/test/parallel/test-tls-empty-sni-context.js
+++ b/test/parallel/test-tls-empty-sni-context.js
@@ -16,7 +16,7 @@ const options = {
 const server = tls.createServer(options, (c) => {
   assert.fail('Should not be called');
 }).on('tlsClientError', common.mustCall((err, c) => {
-  assert.match(err.message, /SSL_use_certificate:passed a null parameter/i);
+  assert.match(err.message, /passed a null parameter/i);
   server.close();
 })).listen(0, common.mustCall(() => {
   const c = tls.connect({
diff --git a/test/parallel/test-tls-set-ciphers-error.js b/test/parallel/test-tls-set-ciphers-error.js
index f963b414f44630..0df5a9288de1df 100644
--- a/test/parallel/test-tls-set-ciphers-error.js
+++ b/test/parallel/test-tls-set-ciphers-error.js
@@ -15,11 +15,11 @@ const fixtures = require('../common/fixtures');
     ciphers: 'aes256-sha'
   };
   assert.throws(() => tls.createServer(options, common.mustNotCall()),
-                /no cipher match/i);
+                /no[_ ]cipher[_ ]match/i);
   options.ciphers = 'FOOBARBAZ';
   assert.throws(() => tls.createServer(options, common.mustNotCall()),
-                /no cipher match/i);
+                /no[_ ]cipher[_ ]match/i);
   options.ciphers = 'TLS_not_a_cipher';
   assert.throws(() => tls.createServer(options, common.mustNotCall()),
-                /no cipher match/i);
+                /no[_ ]cipher[_ ]match/i);
 }