diff --git a/src/Adapter/MSTestAdapter.PlatformServices/Services/TestContextImplementation.cs b/src/Adapter/MSTestAdapter.PlatformServices/Services/TestContextImplementation.cs
index 5efc98a041..c3bd509f26 100644
--- a/src/Adapter/MSTestAdapter.PlatformServices/Services/TestContextImplementation.cs
+++ b/src/Adapter/MSTestAdapter.PlatformServices/Services/TestContextImplementation.cs
@@ -524,16 +524,15 @@ private SynchronizedStringBuilder GetTestContextMessagesStringBuilder()
     /// <returns>A fresh context suitable for one folded data-driven iteration.</returns>
     internal TestContextImplementation CloneForDataDrivenIteration()
     {
-        // Take a shallow snapshot of the current property bag so that the clone starts with
-        // the same properties (including TestNameLabel / FullyQualifiedTestClassNameLabel and
-        // anything merged from AssemblyInitialize / ClassInitialize) but is otherwise isolated.
-        // Per-iteration mutations to the clone's property bag won't leak back to this instance
-        // nor to subsequent iterations.
-        var snapshot = new Dictionary<string, object?>(_properties);
-
-        // Pass testMethod: null and testClassFullName: null because the relevant labels are
-        // already in the snapshot. The constructor will copy the snapshot as-is.
-        var clone = new TestContextImplementation(testMethod: null, testClassFullName: null, snapshot, _messageLogger, _testRunCancellationToken);
+        // Pass _properties directly and testMethod: null / testClassFullName: null because the
+        // relevant labels (including TestNameLabel / FullyQualifiedTestClassNameLabel and anything
+        // merged from AssemblyInitialize / ClassInitialize) are already in the property bag. The
+        // constructor's null/null branch copies the supplied properties into a fresh dictionary
+        // via the [with(properties)] spread, so no intermediate snapshot allocation is needed and
+        // isolation is preserved: per-iteration mutations to the clone's property bag won't leak
+        // back to this instance nor to subsequent iterations, and mutations to this instance after
+        // clone creation won't leak into the clone.
+        var clone = new TestContextImplementation(testMethod: null, testClassFullName: null, _properties, _messageLogger, _testRunCancellationToken);
 
         // Preserve TestRunCount so user code that observes it (e.g. retry-aware tests) sees
         // the same value it would see in the unfolded path. TestRunCount represents the