Add the remaining test scripts unit test to the status file exclusion.

tests/standalone/standalone.status

Index: tests/standalone/standalone.status
diff --git a/tests/standalone/standalone.status b/tests/standalone/standalone.status
index a10439513f1f13d8fdced7edb8107dc0703d3fe5..8ef9ee2398ee502b5d57a1e30f0235598b8fab14 100644
--- a/tests/standalone/standalone.status
+++ b/tests/standalone/standalone.status
@@ -4,9 +4,13 @@
 
 package/invalid_uri_test: Fail, OK # Fails intentionally
 
-io/test_runner_exit_code_test: Fail # used by both a test and the VM. Can be reenabled when we replace the precompiled dart executable in tools.
-status_expression_test: Fail # used by both a test and the VM. Can be reenabled when we replace the precompiled dart executable in tools.
-io/status_file_parser_test: Fail # used by both a test and the VM. Can be reenabled when we replace the precompiled dart executable in tools.
+# These tests fail because the test scripts do not use the new streams library.
+# When the test scripts are updated, and the precompiled dart executable is
+# updated, they will be re-enabled.  Issue 7724.
+io/test_runner_test: Fail, Pass
+io/test_runner_exit_code_test: Fail
+status_expression_test: Fail
+io/status_file_parser_test: Fail
 
 [ $runtime == vm ]
 package/package_isolate_test: Fail # Issue 7520.