diff --git a/ports/unix/variants/coverage/frzmpy/frzmpy4.py b/ports/unix/variants/coverage/frzmpy/frzmpy4.py
new file mode 100644
index 000000000000..669b37535b0f
--- /dev/null
+++ b/ports/unix/variants/coverage/frzmpy/frzmpy4.py
@@ -0,0 +1,16 @@
+# Test importing frozen functions.
+
+# A simple bytecode function with no children.
+def f():
+    return 1
+
+
+print(__name__, f())
+
+
+# A simple bytecode generator with no children.
+def g():
+    yield 2
+
+
+print(__name__, next(g()))
diff --git a/tests/ports/unix/extra_coverage.py b/tests/ports/unix/extra_coverage.py
index 0ea8f7886bff..ec68a5550813 100644
--- a/tests/ports/unix/extra_coverage.py
+++ b/tests/ports/unix/extra_coverage.py
@@ -87,6 +87,9 @@
 # test importing various objects
 import frzmpy3
 
+# test importing other things
+import frzmpy4
+
 # test for MP_QSTR_NULL regression
 from frzqstr import returns_NULL
 
diff --git a/tests/ports/unix/extra_coverage.py.exp b/tests/ports/unix/extra_coverage.py.exp
index 3db1c5a63e54..adffc2d5824a 100644
--- a/tests/ports/unix/extra_coverage.py.exp
+++ b/tests/ports/unix/extra_coverage.py.exp
@@ -201,6 +201,8 @@ ZeroDivisionError
 X
 '\x1b'
 b'\x00\xff'
+frzmpy4 1
+frzmpy4 2
 NULL
 uPy
 a long string that is not interned