Use the configuration for determining the binary to use for testing.

tests/standalone/src/TestRunnerTest.dart

Index: tests/standalone/src/TestRunnerTest.dart
diff --git a/tests/standalone/src/TestRunnerTest.dart b/tests/standalone/src/TestRunnerTest.dart
index 85668b0d999d77d017d412e27b2d2f5b16b31216..cdc68b1c8892b331ece3896db6a5ee6109ec9d1f 100644
--- a/tests/standalone/src/TestRunnerTest.dart
+++ b/tests/standalone/src/TestRunnerTest.dart
@@ -44,7 +44,7 @@ TestCase MakeTestCase(String testName, List<String> expectations) {
   }
 
   return new TestCase(testName,
-                      getDartShellFileName(),
+                      getDartBinName(),
                       <String>["--ignore-unrecognized-flags",
                                "--enable_type_checks",
                                test_path],
@@ -52,6 +52,22 @@ TestCase MakeTestCase(String testName, List<String> expectations) {
                       new Set<String>.from(expectations));
 }
 
+
+String getDartBinName() {
+  var names = ["out/Debug_ia32/dart_bin",
+               "out/Release_ia32/dart_bin",
+               "xcodebuild/Debug_ia32/dart_bin",
+               "xcodebuild/Release_ia32/dart_bin",
+               "Debug_ia32/dart_bin.exe",
+               "Release_ia32/dart_bin.exe"];
+  for (var name in names) {
+    if (new File(name).existsSync()) {
+      return name;
+    }
+  }
+}
+
+
 String getProcessTestFileName() {
   var names = ['out/Release_ia32/process_test',
                'out/Debug_ia32/process_test',