diff --git a/tests/micro-tests/test_format_set_executor_token.py b/tests/micro-tests/test_format_set_executor_token.py
new file mode 100644
index 00000000..d4ea5360
--- /dev/null
+++ b/tests/micro-tests/test_format_set_executor_token.py
@@ -0,0 +1,161 @@
+"""ISSUE-86: `exec_report_spec(..., token=...)` must authenticate the client it
+builds with `set_bearer_token(token)` instead of minting one from
+user/user_pass, on BOTH client-building paths (the format-row/find path and
+the analytic_function path). With no token, behaviour is unchanged
+(`create_egeria_bearer_token()`)."""
+import pytest
+
+from pyegeria.view import format_set_executor as fse
+from pyegeria.core import mcp_adapter
+
+
+class _RecordingClient:
+    """Stands in for any OMVS client class the executor instantiates."""
+    instances: list = []
+
+    def __init__(self, view_server, view_url, user_id=None, user_pwd=None, **kw):
+        self.view_server = view_server
+        self.platform_url = view_url
+        self.user_id = user_id
+        self.user_pwd = user_pwd
+        self.token = None
+        self.calls: list[str] = []
+        _RecordingClient.instances.append(self)
+
+    def create_egeria_bearer_token(self, *a, **kw):
+        self.calls.append("create")
+        self.token = "minted"
+        return self.token
+
+    def set_bearer_token(self, token):
+        self.calls.append("set")
+        self.token = token
+
+    def find_things(self, **kwargs):
+        return [{"guid": "1", "displayName": "x"}]
+
+
+@pytest.fixture(autouse=True)
+def _reset_instances():
+    _RecordingClient.instances = []
+    yield
+    _RecordingClient.instances = []
+
+
+_FIND_FMT = {
+    "action": {
+        "function": "Fake.find_things",
+        "required_params": [],
+        "optional_params": [],
+        "spec_params": {},
+    },
+    "target_type": "Referenceable",
+}
+
+_ANALYTIC_FMT = {
+    "action": {"analytic_function": "fake.analytic", "analytic_spec_params": {}},
+    "target_type": "Referenceable",
+}
+
+
+def _patch_find_path(monkeypatch):
+    monkeypatch.setattr(fse, "select_report_spec", lambda name, out: _FIND_FMT)
+    monkeypatch.setattr(fse, "get_report_registry", lambda: {})
+    monkeypatch.setattr(fse, "_resolve_client_and_method",
+                        lambda decl: (_RecordingClient, "find_things"))
+
+
+def _patch_analytic_path(monkeypatch):
+    def _analytic(client):
+        return {"count": 3, "token_seen": client.token}
+    monkeypatch.setattr(fse, "select_report_spec", lambda name, out: _ANALYTIC_FMT)
+    monkeypatch.setattr(fse, "get_report_registry", lambda: {})
+    monkeypatch.setattr(fse, "_resolve_analytic_function", lambda decl: _analytic)
+    monkeypatch.setattr(fse, "EgeriaTech", _RecordingClient)
+
+
+# --- format-row (find_method) path -------------------------------------------
+
+def test_find_path_with_token_uses_set_bearer_token(monkeypatch):
+    _patch_find_path(monkeypatch)
+    result = fse.exec_report_spec(
+        "Anything", output_format="DICT", view_server="vs", view_url="https://x",
+        user="svc", user_pass="svc-pw", token="user-token",
+    )
+    assert result["kind"] == "json"
+    (client,) = _RecordingClient.instances
+    assert client.calls == ["set"]
+    assert client.token == "user-token"
+
+
+def test_find_path_without_token_mints_bearer_token(monkeypatch):
+    _patch_find_path(monkeypatch)
+    result = fse.exec_report_spec(
+        "Anything", output_format="DICT", view_server="vs", view_url="https://x",
+        user="svc", user_pass="svc-pw",
+    )
+    assert result["kind"] == "json"
+    (client,) = _RecordingClient.instances
+    assert client.calls == ["create"]
+    assert client.user_id == "svc" and client.user_pwd == "svc-pw"
+
+
+# --- analytic_function path ---------------------------------------------------
+
+def test_analytic_path_with_token_uses_set_bearer_token(monkeypatch):
+    _patch_analytic_path(monkeypatch)
+    result = fse.exec_report_spec(
+        "Anything", output_format="DICT", view_server="vs", view_url="https://x",
+        user="svc", user_pass="svc-pw", token="user-token",
+    )
+    assert result == {"kind": "json", "data": {"count": 3, "token_seen": "user-token"}}
+    (client,) = _RecordingClient.instances
+    assert client.calls == ["set"]
+
+
+def test_analytic_path_without_token_mints_bearer_token(monkeypatch):
+    _patch_analytic_path(monkeypatch)
+    result = fse.exec_report_spec(
+        "Anything", output_format="DICT", view_server="vs", view_url="https://x",
+        user="svc", user_pass="svc-pw",
+    )
+    assert result["data"]["token_seen"] == "minted"
+    (client,) = _RecordingClient.instances
+    assert client.calls == ["create"]
+
+
+def test_chart_path_threads_token(monkeypatch):
+    """SERIES/BAR/PIE dispatch to _exec_analytic_chart before the Format-row
+    lookup -- the token must survive that hop too."""
+    _patch_analytic_path(monkeypatch)
+    monkeypatch.setattr(fse, "get_report_spec_heading", lambda name: "H", raising=False)
+    fse.exec_report_spec(
+        "Anything", output_format="BAR", view_server="vs", view_url="https://x",
+        user="svc", user_pass="svc-pw", token="user-token",
+    )
+    (client,) = _RecordingClient.instances
+    assert client.calls == ["set"]
+    assert client.token == "user-token"
+
+
+# --- MCP adapter passthrough --------------------------------------------------
+
+def test_mcp_run_report_forwards_token(monkeypatch):
+    seen = {}
+
+    def _fake_exec(**kwargs):
+        seen.update(kwargs)
+        return {"kind": "empty"}
+
+    monkeypatch.setattr(mcp_adapter, "exec_report_spec", _fake_exec)
+    mcp_adapter.run_report(report="R", user="u", user_pass="p", token="tok")
+    assert seen["token"] == "tok"
+    assert seen["user"] == "u" and seen["user_pass"] == "p"
+
+
+def test_mcp_run_report_default_token_is_none(monkeypatch):
+    seen = {}
+    monkeypatch.setattr(mcp_adapter, "exec_report_spec",
+                        lambda **kw: seen.update(kw) or {"kind": "empty"})
+    mcp_adapter.run_report(report="R", user="u", user_pass="p")
+    assert seen["token"] is None