diff --git a/tests/unit/project_loader/extensions/test_gnome_3_28.py b/tests/unit/project_loader/extensions/test_gnome_3_28.py
index c4b7c4b130..717d1fe63f 100644
--- a/tests/unit/project_loader/extensions/test_gnome_3_28.py
+++ b/tests/unit/project_loader/extensions/test_gnome_3_28.py
@@ -72,7 +72,9 @@ def test_extension(self):
                         "/usr/share/xml/iso-codes": {
                             "bind": "$SNAP/gnome-platform/usr/share/xml/iso-codes"
                         },
-                        "/usr/share/libdrm": {"bind": "$SNAP/gnome-platform/usr/share/libdrm"},
+                        "/usr/share/libdrm": {
+                            "bind": "$SNAP/gnome-platform/usr/share/libdrm"
+                        },
                     },
                 }
             ),
diff --git a/tests/unit/project_loader/extensions/test_gnome_3_34.py b/tests/unit/project_loader/extensions/test_gnome_3_34.py
index 1493f936b2..f7c9d94292 100644
--- a/tests/unit/project_loader/extensions/test_gnome_3_34.py
+++ b/tests/unit/project_loader/extensions/test_gnome_3_34.py
@@ -75,7 +75,9 @@ def test_extension(self):
                         "/usr/share/xml/iso-codes": {
                             "bind": "$SNAP/gnome-platform/usr/share/xml/iso-codes"
                         },
-                        "/usr/share/libdrm": {"bind": "$SNAP/gnome-platform/usr/share/libdrm"},
+                        "/usr/share/libdrm": {
+                            "bind": "$SNAP/gnome-platform/usr/share/libdrm"
+                        },
                     },
                 }
             ),
diff --git a/tests/unit/project_loader/extensions/test_gnome_3_38.py b/tests/unit/project_loader/extensions/test_gnome_3_38.py
index 59dc33e155..2c287a040c 100644
--- a/tests/unit/project_loader/extensions/test_gnome_3_38.py
+++ b/tests/unit/project_loader/extensions/test_gnome_3_38.py
@@ -75,7 +75,9 @@ def test_extension(self):
                         "/usr/share/xml/iso-codes": {
                             "bind": "$SNAP/gnome-platform/usr/share/xml/iso-codes"
                         },
-                        "/usr/share/libdrm": {"bind": "$SNAP/gnome-platform/usr/share/libdrm"},
+                        "/usr/share/libdrm": {
+                            "bind": "$SNAP/gnome-platform/usr/share/libdrm"
+                        },
                     },
                 }
             ),