diff --git a/pkgs/test/README.md b/pkgs/test/README.md
index 7c91633..a661323 100644
--- a/pkgs/test/README.md
+++ b/pkgs/test/README.md
@@ -171,6 +171,19 @@
 pub run test --total-shards 3 --shard-index 2 path/to/test.dart
 ```
 
+### Shuffling Tests
+Test order can be shuffled with the `--test-randomize-ordering-seed` argument.
+This allows you to shuffle your tests with a specific seed (deterministic) or
+a random seed for each run. For example, consider the following test runs:
+
+```bash
+pub run test --test-randomize-ordering-seed=12345
+pub run test --test-randomize-ordering-seed=random
+```
+
+Setting `--test-randomize-ordering-seed=0` will have the same effect as not
+specifying it at all, meaning the test order will remain as-is.
+
 ### Collecting Code Coverage
 To collect code coverage, you can run tests with the `--coverage <directory>`
 argument. The directory specified can be an absolute or relative path. 
diff --git a/pkgs/test/test/runner/configuration/suite_test.dart b/pkgs/test/test/runner/configuration/suite_test.dart
index 56b8119..a1b4eb7 100644
--- a/pkgs/test/test/runner/configuration/suite_test.dart
+++ b/pkgs/test/test/runner/configuration/suite_test.dart
@@ -20,7 +20,7 @@
         expect(merged.runSkipped, isFalse);
         expect(merged.precompiledPath, isNull);
         expect(merged.runtimes, equals([Runtime.vm.identifier]));
-        expect(merged.testRandomizeOrderingSeed, 0);
+        expect(merged.testRandomizeOrderingSeed, null);
       });
 
       test("if only the old configuration's is defined, uses it", () {
diff --git a/pkgs/test_core/CHANGELOG.md b/pkgs/test_core/CHANGELOG.md
index e43f0ab..f28a372 100644
--- a/pkgs/test_core/CHANGELOG.md
+++ b/pkgs/test_core/CHANGELOG.md
@@ -3,6 +3,8 @@
 * Bump minimum SDK to `2.4.0` for safer usage of for-loop elements.
 * Deprecate `PhantomJS` and provide warning when used. Support for `PhantomJS`
   will be removed in version `2.0.0`.
+* Differentiate between test-randomize-ordering-seed not set and 0 being chosen
+  as the random seed.
 
 ## 0.2.18
 
diff --git a/pkgs/test_core/lib/src/runner/configuration/args.dart b/pkgs/test_core/lib/src/runner/configuration/args.dart
index ed7dd26..d4d8ab8 100644
--- a/pkgs/test_core/lib/src/runner/configuration/args.dart
+++ b/pkgs/test_core/lib/src/runner/configuration/args.dart
@@ -220,7 +220,7 @@
       var seed = value == 'random'
           ? Random().nextInt(4294967295)
           : int.parse(value).toUnsigned(32);
-      if (seed != null && seed > 0) {
+      if (seed != null) {
         print('Shuffling test order with --test-randomize-ordering-seed=$seed');
       }
       return seed;
diff --git a/pkgs/test_core/lib/src/runner/engine.dart b/pkgs/test_core/lib/src/runner/engine.dart
index cf7dbd6..e4a7fa4 100644
--- a/pkgs/test_core/lib/src/runner/engine.dart
+++ b/pkgs/test_core/lib/src/runner/engine.dart
@@ -323,7 +323,8 @@
       if (!_closed && setUpAllSucceeded) {
         // shuffle the group entries
         var entries = group.entries.toList();
-        if (suiteConfig.testRandomizeOrderingSeed > 0) {
+        if (suiteConfig.testRandomizeOrderingSeed != null &&
+            suiteConfig.testRandomizeOrderingSeed > 0) {
           entries.shuffle(Random(suiteConfig.testRandomizeOrderingSeed));
         }
 
diff --git a/pkgs/test_core/lib/src/runner/suite.dart b/pkgs/test_core/lib/src/runner/suite.dart
index 233dc72..c95494a 100644
--- a/pkgs/test_core/lib/src/runner/suite.dart
+++ b/pkgs/test_core/lib/src/runner/suite.dart
@@ -85,10 +85,9 @@
   final Map<PlatformSelector, SuiteConfiguration> onPlatform;
 
   /// The seed with which to shuffle the test order.
-  /// Default value is 0 if not provided and will not change the test order.
+  /// Default value is null if not provided and will not change the test order.
   /// The same seed will shuffle the tests in the same way every time.
-  int get testRandomizeOrderingSeed => _testRandomizeOrderingSeed ?? 0;
-  final int _testRandomizeOrderingSeed;
+  final int testRandomizeOrderingSeed;
 
   /// The global test metadata derived from this configuration.
   Metadata get metadata {
@@ -202,7 +201,7 @@
         excludeTags = excludeTags ?? BooleanSelector.none,
         tags = _map(tags),
         onPlatform = _map(onPlatform),
-        _testRandomizeOrderingSeed = testRandomizeOrderingSeed,
+        testRandomizeOrderingSeed = testRandomizeOrderingSeed,
         _metadata = metadata ?? Metadata.empty;
 
   /// Creates a new [SuiteConfiguration] that takes its configuration from
@@ -252,7 +251,7 @@
         tags: _mergeConfigMaps(tags, other.tags),
         onPlatform: _mergeConfigMaps(onPlatform, other.onPlatform),
         testRandomizeOrderingSeed:
-            other._testRandomizeOrderingSeed ?? _testRandomizeOrderingSeed,
+            other.testRandomizeOrderingSeed ?? testRandomizeOrderingSeed,
         metadata: metadata.merge(other.metadata));
     return config._resolveTags();
   }
@@ -295,7 +294,7 @@
         tags: tags ?? this.tags,
         onPlatform: onPlatform ?? this.onPlatform,
         testRandomizeOrderingSeed:
-            testRandomizeOrderingSeed ?? _testRandomizeOrderingSeed,
+            testRandomizeOrderingSeed ?? testRandomizeOrderingSeed,
         metadata: _metadata.change(
             timeout: timeout,
             verboseTrace: verboseTrace,