diff --git a/py/runtime.c b/py/runtime.c
index 2657e7cc25..6b7a9ce3c6 100644
--- a/py/runtime.c
+++ b/py/runtime.c
@@ -1319,7 +1319,12 @@ mp_vm_return_kind_t mp_resume(mp_obj_t self_in, mp_obj_t send_value, mp_obj_t th
         // will be propagated up. This behavior is approved by test_pep380.py
         // test_delegation_of_close_to_non_generator(),
         //  test_delegating_throw_to_non_generator()
-        *ret_val = mp_make_raise_obj(throw_value);
+        if (mp_obj_exception_match(throw_value, MP_OBJ_FROM_PTR(&mp_type_StopIteration))) {
+            // PEP479: if StopIteration is raised inside a generator it is replaced with RuntimeError
+            *ret_val = mp_obj_new_exception_msg(&mp_type_RuntimeError, "generator raised StopIteration");
+        } else {
+            *ret_val = mp_make_raise_obj(throw_value);
+        }
         return MP_VM_RETURN_EXCEPTION;
     }
 }
diff --git a/py/vm.c b/py/vm.c
index 6e5015fc43..7c702f3863 100644
--- a/py/vm.c
+++ b/py/vm.c
@@ -1266,17 +1266,10 @@ yield:
                         DISPATCH();
                     } else {
                         assert(ret_kind == MP_VM_RETURN_EXCEPTION);
+                        assert(!EXC_MATCH(ret_value, MP_OBJ_FROM_PTR(&mp_type_StopIteration)));
                         // Pop exhausted gen
                         sp--;
-                        if (EXC_MATCH(ret_value, MP_OBJ_FROM_PTR(&mp_type_StopIteration))) {
-                            PUSH(mp_obj_exception_get_value(ret_value));
-                            // If we injected GeneratorExit downstream, then even
-                            // if it was swallowed, we re-raise GeneratorExit
-                            GENERATOR_EXIT_IF_NEEDED(t_exc);
-                            DISPATCH();
-                        } else {
-                            RAISE(ret_value);
-                        }
+                        RAISE(ret_value);
                     }
                 }
 
diff --git a/tests/basics/generator_pep479.py b/tests/basics/generator_pep479.py
index e422c349e7..5385312170 100644
--- a/tests/basics/generator_pep479.py
+++ b/tests/basics/generator_pep479.py
@@ -27,3 +27,14 @@ try:
     g.throw(StopIteration)
 except RuntimeError:
     print('RuntimeError')
+
+# throwing a StopIteration through yield from, will be converted to a RuntimeError
+def gen():
+    yield from range(2)
+    print('should not get here')
+g = gen()
+print(next(g))
+try:
+    g.throw(StopIteration)
+except RuntimeError:
+    print('RuntimeError')
diff --git a/tests/basics/generator_pep479.py.exp b/tests/basics/generator_pep479.py.exp
index c64fe49561..6101339462 100644
--- a/tests/basics/generator_pep479.py.exp
+++ b/tests/basics/generator_pep479.py.exp
@@ -3,3 +3,5 @@ RuntimeError
 StopIteration
 1
 RuntimeError
+0
+RuntimeError