diff --git a/src/systemrdl/flags.py b/src/systemrdl/flags.py
new file mode 100644
index 0000000..b63a374
--- /dev/null
+++ b/src/systemrdl/flags.py
@@ -0,0 +1,6 @@
+from absl import flags
+
+HETERO_ARRAYS = flags.DEFINE_bool(
+    'experimental_hetero_arrays',
+    False,
+    'Support heterogeneous arrays.')
diff --git a/test/rdl_err_src/hetero_array.rdl b/test/rdl_err_src/hetero_array.rdl
new file mode 100644
index 0000000..a94fad4
--- /dev/null
+++ b/test/rdl_err_src/hetero_array.rdl
@@ -0,0 +1,13 @@
+addrmap top {
+  reg reg_t {
+    field{} f;
+  };
+
+  regfile {
+    reg {
+      field {} f;
+    } some_reg;
+  } some_rf[2];
+
+  some_ref[0].some_reg->name = "foobar";
+};
diff --git a/test/requirements.txt b/test/requirements.txt
index 12d00f3..ca610ab 100644
--- a/test/requirements.txt
+++ b/test/requirements.txt
@@ -1,3 +1,4 @@
+absl-py
 pytest
 pytest-cov
 parameterized
diff --git a/test/test_hetero_array.py b/test/test_hetero_array.py
new file mode 100644
index 0000000..83427de
--- /dev/null
+++ b/test/test_hetero_array.py
@@ -0,0 +1,16 @@
+from absl.testing import flagsaver
+from unittest_utils import RDLSourceTestCase
+
+class TestHeteroArray(RDLSourceTestCase):
+    """Test hetero arrays."""
+
+    maxDiff = None  # pylint: disable=invalid-name
+
+    @flagsaver.flagsaver(experimental_hetero_arrays=False)
+    def test_disabled(self):
+        self.assertRDLCompileError(
+                ['rdl_err_src/hetero_array.rdl'],
+                None,
+                'Use of array suffixes in dynamic property assignments is not'
+                ' supported',
+        )
diff --git a/test/unittest_utils.py b/test/unittest_utils.py
index 801ac82..9933fd9 100644
--- a/test/unittest_utils.py
+++ b/test/unittest_utils.py
@@ -3,6 +3,8 @@
 import logging
 import re
 
+import systemrdl.flags
+
 from antlr4 import InputStream
 from systemrdl import RDLCompiler
 from systemrdl.parser import sa_systemrdl