diff --git a/test/run/test_assemblers.py b/test/run/test_assemblers.py
index 54f77eb5..77e214b9 100644
--- a/test/run/test_assemblers.py
+++ b/test/run/test_assemblers.py
@@ -101,7 +101,7 @@ class TestAssemblers(test.TestBase):
                 options = {
                     "filename": "image.raw",
                     "root_fs_uuid": "016a1cda-5182-4ab3-bf97-426b00b74eb0",
-                    "size": 512 * MEBIBYTE,
+                    "size": 1024 * MEBIBYTE,
                     "fs_type": fs_type,
                 }
                 with self.osbuild as osb:
@@ -154,7 +154,7 @@ class TestAssemblers(test.TestBase):
                         "filename": f"image.{fmt}",
                         "ptuuid": "b2c09a39-db93-44c5-846a-81e06b1dc162",
                         "root_fs_uuid": "aff010e9-df95-4f81-be6b-e22317251033",
-                        "size": 512 * MEBIBYTE,
+                        "size": 1024 * MEBIBYTE,
                         "root_fs_type": fs_type,
                     }
                     with self.run_assembler(osb,