diff --git a/tests/prefixed_sort_order/base-secondary.rbc b/tests/prefixed_sort_order/base-secondary.rbc
new file mode 100644
index 0000000..5446e8f
--- /dev/null
+++ b/tests/prefixed_sort_order/base-secondary.rbc
@@ -0,0 +1,21 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load("//build/make/core:product_config.rbc", "rblf")
+
+def init(g, handle):
+  cfg = rblf.cfg(handle)
+
+  g.setdefault("MY_VAR", [])
+  g["MY_VAR"] += ["foo"]
diff --git a/tests/prefixed_sort_order/base.rbc b/tests/prefixed_sort_order/base.rbc
new file mode 100644
index 0000000..05b0d5d
--- /dev/null
+++ b/tests/prefixed_sort_order/base.rbc
@@ -0,0 +1,21 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load("//build/make/core:product_config.rbc", "rblf")
+
+def init(g, handle):
+  cfg = rblf.cfg(handle)
+
+  g.setdefault("MY_VAR", [])
+  g["MY_VAR"] += ["bar"]
diff --git a/tests/prefixed_sort_order/product.rbc b/tests/prefixed_sort_order/product.rbc
new file mode 100644
index 0000000..619b2c0
--- /dev/null
+++ b/tests/prefixed_sort_order/product.rbc
@@ -0,0 +1,29 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load("//build/make/core:product_config.rbc", "rblf")
+load(":base.rbc", _base_init = "init")
+load(":base-secondary.rbc", _base_secondary_init = "init")
+
+def init(g, handle):
+  cfg = rblf.cfg(handle)
+
+  # It's important that base-secondary uses a dash, an underscore won't expose the sort order issue:
+  # >>> sorted(["base", "base-secondary"])
+  # ['base', 'base-secondary']
+  # >>> sorted(["base.mk", "base-secondary.mk"])
+  # ['base-secondary.mk', 'base.mk']
+
+  rblf.inherit(handle, "base", _base_init)
+  rblf.inherit(handle, "base-secondary", _base_secondary_init)
diff --git a/tests/prefixed_sort_order/test.rbc b/tests/prefixed_sort_order/test.rbc
new file mode 100644
index 0000000..e59a509
--- /dev/null
+++ b/tests/prefixed_sort_order/test.rbc
@@ -0,0 +1,26 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load("//build/make/core:product_config.rbc", "rblf")
+load("//build/make/tests/input_variables.rbc", input_variables_init = "init")
+load(":product.rbc", "init")
+
+
+def assert_eq(expected, actual):
+    if expected != actual:
+        fail("Expected '%s', got '%s'" % (expected, actual))
+
+def test():
+    (globals, globals_base) = rblf.product_configuration("test/device", init, input_variables_init)
+    assert_eq(["foo", "bar"], globals["MY_VAR"])
diff --git a/tests/run.rbc b/tests/run.rbc
index 56ba394..77b6e89 100644
--- a/tests/run.rbc
+++ b/tests/run.rbc
@@ -27,6 +27,7 @@
 load(":board_input_vars.rbc", board_input_vars_init = "init")
 load("//build/make/tests/single_value_inheritance:test.rbc", test_single_value_inheritance = "test")
 load("//build/make/tests/artifact_path_requirements:test.rbc", test_artifact_path_requirements = "test")
+load("//build/make/tests/prefixed_sort_order:test.rbc", test_prefixed_sort_order = "test")
 
 def assert_eq(expected, actual):
     if expected != actual:
@@ -142,3 +143,4 @@
 
 test_single_value_inheritance()
 test_artifact_path_requirements()
+test_prefixed_sort_order()