diff --git a/arkindex_worker/worker/element.py b/arkindex_worker/worker/element.py
index df22528255701e35f5d0f02b1dcad53e2d2e6e36..a22dbd0e54646c1c20223f27d2445fc01cee4940 100644
--- a/arkindex_worker/worker/element.py
+++ b/arkindex_worker/worker/element.py
@@ -104,6 +104,7 @@ class ElementMixin(object):
 
         sub_element = self.request(
             "CreateElement",
+            slim_output=slim_output,
             body={
                 "type": type,
                 "name": name,
diff --git a/tests/test_elements_worker/test_elements.py b/tests/test_elements_worker/test_elements.py
index e3ad26f775ab3128db757ad2d2cb2d99045e4e8f..7ff1685547d830dc3784e69bb54c52e6c64f9e76 100644
--- a/tests/test_elements_worker/test_elements.py
+++ b/tests/test_elements_worker/test_elements.py
@@ -447,7 +447,7 @@ def test_create_sub_element_api_error(responses, mock_elements_worker):
     )
     responses.add(
         responses.POST,
-        "http://testserver/api/v1/elements/create/",
+        "http://testserver/api/v1/elements/create/?slim_output=True",
         status=500,
     )
 
@@ -464,11 +464,11 @@ def test_create_sub_element_api_error(responses, mock_elements_worker):
         (call.request.method, call.request.url) for call in responses.calls
     ] == BASE_API_CALLS + [
         # We retry 5 times the API call
-        ("POST", "http://testserver/api/v1/elements/create/"),
-        ("POST", "http://testserver/api/v1/elements/create/"),
-        ("POST", "http://testserver/api/v1/elements/create/"),
-        ("POST", "http://testserver/api/v1/elements/create/"),
-        ("POST", "http://testserver/api/v1/elements/create/"),
+        ("POST", "http://testserver/api/v1/elements/create/?slim_output=True"),
+        ("POST", "http://testserver/api/v1/elements/create/?slim_output=True"),
+        ("POST", "http://testserver/api/v1/elements/create/?slim_output=True"),
+        ("POST", "http://testserver/api/v1/elements/create/?slim_output=True"),
+        ("POST", "http://testserver/api/v1/elements/create/?slim_output=True"),
     ]
 
 
@@ -488,7 +488,7 @@ def test_create_sub_element(responses, mock_elements_worker, slim_output):
     }
     responses.add(
         responses.POST,
-        "http://testserver/api/v1/elements/create/",
+        f"http://testserver/api/v1/elements/create/?slim_output={slim_output}",
         status=200,
         json=child_elt,
     )
@@ -505,7 +505,10 @@ def test_create_sub_element(responses, mock_elements_worker, slim_output):
     assert [
         (call.request.method, call.request.url) for call in responses.calls
     ] == BASE_API_CALLS + [
-        ("POST", "http://testserver/api/v1/elements/create/"),
+        (
+            "POST",
+            f"http://testserver/api/v1/elements/create/?slim_output={slim_output}",
+        ),
     ]
     assert json.loads(responses.calls[-1].request.body) == {
         "type": "something",
@@ -533,7 +536,7 @@ def test_create_sub_element_confidence(responses, mock_elements_worker):
     )
     responses.add(
         responses.POST,
-        "http://testserver/api/v1/elements/create/",
+        "http://testserver/api/v1/elements/create/?slim_output=True",
         status=200,
         json={"id": "12345678-1234-1234-1234-123456789123"},
     )
@@ -550,7 +553,7 @@ def test_create_sub_element_confidence(responses, mock_elements_worker):
     assert [
         (call.request.method, call.request.url) for call in responses.calls
     ] == BASE_API_CALLS + [
-        ("POST", "http://testserver/api/v1/elements/create/"),
+        ("POST", "http://testserver/api/v1/elements/create/?slim_output=True"),
     ]
     assert json.loads(responses.calls[-1].request.body) == {
         "type": "something",