diff --git a/requirements-test.txt b/requirements-test.txt
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -6,7 +6,7 @@
 pytest
 pytest-django
 pytest-mock
-requests-mock
+requests-mock != 1.9.0, != 1.9.1
 swh.core[http] >= 0.0.95
 swh.loader.git >= 0.8.0
 swh.storage >= 0.1.1
diff --git a/swh/web/api/views/graph.py b/swh/web/api/views/graph.py
--- a/swh/web/api/views/graph.py
+++ b/swh/web/api/views/graph.py
@@ -6,7 +6,6 @@
 from distutils.util import strtobool
 import json
 from typing import Dict, Iterator, Union
-from urllib.parse import quote
 
 import requests
 
@@ -136,7 +135,7 @@
                 "You do not have permission to perform this action.", status=403
             )
     graph_query_url = get_config()["graph"]["server_url"]
-    graph_query_url += quote(graph_query)
+    graph_query_url += graph_query
     if request.GET:
         graph_query_url += "?" + request.GET.urlencode(safe="/;:")
     response = requests.get(graph_query_url, stream=True)
diff --git a/swh/web/tests/api/views/test_graph.py b/swh/web/tests/api/views/test_graph.py
--- a/swh/web/tests/api/views/test_graph.py
+++ b/swh/web/tests/api/views/test_graph.py
@@ -6,7 +6,6 @@
 import hashlib
 import json
 import textwrap
-from urllib.parse import quote
 
 from hypothesis import given
 
@@ -87,14 +86,11 @@
         """
     )
 
-    # ensure compatibility with all requests-mock versions
-    # https://github.com/jamielennox/requests-mock/commit/f072845
-    for path in (graph_query, quote(graph_query)):
-        requests_mock.get(
-            get_config()["graph"]["server_url"] + path,
-            text=response_text,
-            headers={"Content-Type": "text/plain", "Transfer-Encoding": "chunked"},
-        )
+    requests_mock.get(
+        get_config()["graph"]["server_url"] + graph_query,
+        text=response_text,
+        headers={"Content-Type": "text/plain", "Transfer-Encoding": "chunked"},
+    )
 
     url = reverse("api-1-graph", url_args={"graph_query": graph_query})
 
@@ -152,17 +148,14 @@
         """
     )
 
-    # ensure compatibility with all requests-mock versions
-    # https://github.com/jamielennox/requests-mock/commit/f072845
-    for path in (graph_query, quote(graph_query)):
-        requests_mock.get(
-            get_config()["graph"]["server_url"] + path,
-            text=response_ndjson,
-            headers={
-                "Content-Type": "application/x-ndjson",
-                "Transfer-Encoding": "chunked",
-            },
-        )
+    requests_mock.get(
+        get_config()["graph"]["server_url"] + graph_query,
+        text=response_ndjson,
+        headers={
+            "Content-Type": "application/x-ndjson",
+            "Transfer-Encoding": "chunked",
+        },
+    )
 
     url = reverse("api-1-graph", url_args={"graph_query": graph_query})
 
@@ -212,14 +205,11 @@
         # set two lines response to check resolved origins cache
         response_text = response_text + response_text
 
-        # ensure compatibility with all requests-mock versions
-        # https://github.com/jamielennox/requests-mock/commit/f072845
-        for path in (graph_query, quote(graph_query)):
-            requests_mock.get(
-                get_config()["graph"]["server_url"] + path,
-                text=response_text,
-                headers={"Content-Type": content_type, "Transfer-Encoding": "chunked"},
-            )
+        requests_mock.get(
+            get_config()["graph"]["server_url"] + graph_query,
+            text=response_text,
+            headers={"Content-Type": content_type, "Transfer-Encoding": "chunked"},
+        )
 
         url = reverse(
             "api-1-graph",