diff --git a/lib/_tls_wrap.js b/lib/_tls_wrap.js
index b38558cbe93280..48108710933382 100644
--- a/lib/_tls_wrap.js
+++ b/lib/_tls_wrap.js
@@ -1749,11 +1749,7 @@ exports.connect = function connect(...args) {
     options.singleUse = true;
 
   validateFunction(options.checkServerIdentity, 'options.checkServerIdentity');
-  assert(typeof options.minDHSize === 'number',
-         'options.minDHSize is not a number: ' + options.minDHSize);
-  assert(options.minDHSize > 0,
-         'options.minDHSize is not a positive number: ' +
-         options.minDHSize);
+  validateNumber(options.minDHSize, 'options.minDHSize', 1);
 
   const context = options.secureContext || tls.createSecureContext(options);
 
diff --git a/test/parallel/test-tls-client-mindhsize.js b/test/parallel/test-tls-client-mindhsize.js
index 92ac995936825d..585632d37a20c8 100644
--- a/test/parallel/test-tls-client-mindhsize.js
+++ b/test/parallel/test-tls-client-mindhsize.js
@@ -74,16 +74,23 @@ testDHE1024();
 assert.throws(() => test(512, true, common.mustNotCall()),
               /DH parameter is less than 1024 bits/);
 
-let errMessage = /minDHSize is not a positive number/;
-[0, -1, -Infinity, NaN].forEach((minDHSize) => {
-  assert.throws(() => tls.connect({ minDHSize }),
-                errMessage);
-});
+for (const minDHSize of [0, -1, -Infinity, NaN]) {
+  assert.throws(() => {
+    tls.connect({ minDHSize });
+  }, {
+    code: 'ERR_OUT_OF_RANGE',
+    name: 'RangeError',
+  });
+}
 
-errMessage = /minDHSize is not a number/;
-[true, false, null, undefined, {}, [], '', '1'].forEach((minDHSize) => {
-  assert.throws(() => tls.connect({ minDHSize }), errMessage);
-});
+for (const minDHSize of [true, false, null, undefined, {}, [], '', '1']) {
+  assert.throws(() => {
+    tls.connect({ minDHSize });
+  }, {
+    code: 'ERR_INVALID_ARG_TYPE',
+    name: 'TypeError',
+  });
+}
 
 process.on('exit', function() {
   assert.strictEqual(nsuccess, 1);