diff --git a/src/ethereum_clis/clis/geth.py b/src/ethereum_clis/clis/geth.py
index 77e3e9fe205..1591086ebed 100644
--- a/src/ethereum_clis/clis/geth.py
+++ b/src/ethereum_clis/clis/geth.py
@@ -124,8 +124,28 @@ def _consume_debug_dump(
         fixture_path: Path,
         debug_output_path: Path,
     ):
-        debug_fixture_path = debug_output_path / "fixtures.json"
-        consume_direct_call = " ".join(command[:-1]) + f" {debug_fixture_path}"
+        # our assumption is that each command element is a string
+        assert all(isinstance(x, str) for x in command), (
+            f"Not all elements of 'command' list are strings: {command}"
+        )
+
+        # remove element that holds path to cached_downloads json file
+        command = command[:-1]
+
+        # for the now last element (value of --run) ensure it is wrapped in quotations (only relevant for blocktest)  # noqa: E501
+        if "blocktest" in command:
+            if command[-1][0] not in {"'", '"'}:
+                command[-1] = '"' + command[-1] + '"'
+
+        # instead add path to fixtures.json file
+        debug_fixture_path = str(debug_output_path / "fixtures.json")
+        #     but only after fixing the unescaped brackets
+        debug_fixture_path.replace("[", r"\[").replace("]", r"\]")
+        command.append(debug_fixture_path)
+
+        # now turn list into a command string
+        consume_direct_call = " ".join(command)
+
         consume_direct_script = textwrap.dedent(
             f"""\
             #!/bin/bash
diff --git a/src/ethereum_clis/clis/nethermind.py b/src/ethereum_clis/clis/nethermind.py
index 86a1dd0c4de..f4099238405 100644
--- a/src/ethereum_clis/clis/nethermind.py
+++ b/src/ethereum_clis/clis/nethermind.py
@@ -55,13 +55,31 @@ def _consume_debug_dump(
         result: subprocess.CompletedProcess,
         debug_output_path: Path,
     ):
-        consume_direct_call = " ".join(command)
+        # our assumption is that each command element is a string
+        assert all(isinstance(x, str) for x in command), (
+            f"Not all elements of 'command' list are strings: {command}"
+        )
+
+        # ensure that the --filter flag value is wrapped in double-quotes
+        consume_direct_call = ""
+        prev_command_was_filter_flag = False
+        for s in command:
+            if prev_command_was_filter_flag:
+                if s[0] != '"':
+                    s = '"' + s + '"'
+                    prev_command_was_filter_flag = False
+            consume_direct_call += s + " "
+            if s.strip() == "--filter":
+                prev_command_was_filter_flag = True
+        consume_direct_call = consume_direct_call.strip()
+
         consume_direct_script = textwrap.dedent(
             f"""\
             #!/bin/bash
             {consume_direct_call}
             """
         )
+
         dump_files_to_directory(
             str(debug_output_path),
             {