diff --git a/tests/test_utils_hastepics.py b/tests/test_utils_hastepics.py
index b1f124e56..ea46f89f9 100644
--- a/tests/test_utils_hastepics.py
+++ b/tests/test_utils_hastepics.py
@@ -9,6 +9,18 @@ from slic.utils.hastyepics import *
 def _in_pv_cache(pvname: str) -> bool:
     return any(k[0] == pvname for k in _PVcache_.keys())
 
+def _evict_prefix(prefix: str):
+    for k in list(_PVcache_.keys()):
+        if k[0].startswith(prefix):
+            _PVcache_.pop(k, None)
+
+@pytest.fixture(scope="session", autouse=True)
+def clear_pv_cache_at_session_start():
+    """Clear PyEPICS PV cache for our prefix once at session start."""
+    prefix = os.environ.get("TEST_PV_PREFIX", "TEST:")
+    _evict_prefix(prefix)
+    yield
+
 # ============================
 # Tests
 # ============================
@@ -49,53 +61,70 @@ def test_disabled_removed_relative_to_upstream():
     base_init = tuple(getattr(epics.Motor, "_init_list", ()))
     base_extras = dict(getattr(epics.Motor, "_extras", {}))
 
-    had_in_init = "disabled" in base_init
-    had_in_extras = "disabled" in base_extras
+    assert "disabled" in base_init
+    assert "disabled" in base_extras
 
     m = Motor("TEST:SIM:M7")
 
-    if had_in_init:
-        assert "disabled" not in getattr(m, "_init_list", ()), \
+    assert "disabled" not in getattr(m, "_init_list", ()), \
             "disabled devait être retiré de _init_list par rapport à epics.Motor"
 
-    if had_in_extras:
-        assert "disabled" not in getattr(m, "_extras", {}), \
+    assert "disabled" not in getattr(m, "_extras", {}), \
             "disabled devait être retiré de _extras par rapport à epics.Motor"
 
+def _get_cached(name: str):
+    for k, pv in _PVcache_.items():
+        if k[0] == name:
+            return pv
+    return None
 
-def test_motor_init_list_and_extras():
-    """
-    Vérifie la cohérence de _init_list/_extras vs l'upstream :
-    - tout ce que l'upstream expose (hors 'disabled') peut être résolu via PV()/attribut.
-    Sans forcer que _extras soit non vide si l'upstream ne l'est pas.
-    """
+def test_motor_init_list_and_extras_build_handles_eagerly():
     base_init = tuple(getattr(epics.Motor, "_init_list", ()))
     base_extras = dict(getattr(epics.Motor, "_extras", {}))
     base_init_wo_disabled = tuple(x for x in base_init if x != "disabled")
     base_extras_wo_disabled = {k: v for k, v in base_extras.items() if k != "disabled"}
 
-    m = Motor("TEST:SIM:M4")
+    motor_prefix = "TEST:SIM:M4"
 
-    # Pour tous les attributs "init_list" upstream (sans 'disabled'), on doit avoir un PV accessible
-    for attr in base_init_wo_disabled:
-        pv = m.PV(attr, connect=False)
-        assert isinstance(pv, PV), f"{attr} n'est pas un PV"
+    _evict_prefix(motor_prefix)
+    init_pvnames  = [f"{motor_prefix}.{attr}"      for attr in base_init_wo_disabled]
+    extra_pvnames = [f"{motor_prefix}{suffix}"     for suffix in base_extras_wo_disabled.values()]
+    for name in init_pvnames + extra_pvnames:
+        assert not _in_pv_cache(name), f"{name} should not be in cache before Motor()"
 
-    # Pour tous les extras upstream (sans 'disabled'), si l'attribut existe sur m, le pvname doit matcher
+    m = Motor(motor_prefix)
+
+    # init_list: handles exist in cache and are disconnected
+    for name in init_pvnames:
+        assert _in_pv_cache(name), f"{name} not inserted into _PVcache_ by __init__"
+        cached = _get_cached_pv(name)
+        assert cached is not None and not cached.connected
+
+    # handles exist in cache
     for attr_name, suffix in base_extras_wo_disabled.items():
-        if hasattr(m, attr_name):
-            pv = getattr(m, attr_name)
-            assert isinstance(pv, PV), f"{attr_name} n'est pas un PV"
-            assert pv.pvname == f"TEST:SIM:M4{suffix}"
+        name = f"{motor_prefix}{suffix}"
+        assert _in_pv_cache(name), f"{name} not inserted into _PVcache_ by extras loop"
+        cached = _get_cached_pv(name)
+        assert cached is not None and not cached.connected
 
 
-def test_motor_pv_method_connects_and_reads():
-    m = Motor("TEST:SIM:M5")
-    pv_val = m.PV("VAL", connect=True, timeout=3.0)
-    assert pv_val.connected
-    pv_val.put(123.0)
-    time.sleep(0.1)
-    assert pv_val.get() == 123.0
+def test_motor_val_connect_via_cache():
+    motor_prefix = "TEST:SIM:M5"
+    pvname = f"{motor_prefix}.VAL"
+
+    assert not _in_pv_cache(pvname)
+
+    m = Motor(motor_prefix)  
+
+    assert _in_pv_cache(pvname), f"{pvname} should be cached after Motor()"
+
+    pv = _get_cached_pv(pvname)
+    assert pv is not None
+    assert not pv.connected  
+
+    assert pv.connect(timeout=2.0), "VAL did not connect"
+    pv.put(123.0, wait=True)
+    assert pv.get(timeout=1.0) == 123.0
 
 
 def test_speedup_get_pv():
@@ -140,15 +169,14 @@ def test_speedup_motor_instantiation():
 
 def test_speedup_motor_PV():
     # baseline EPICS
-    m_epics = epics.Motor("TEST:SIM:M4")
+    m_epics = epics.Motor("TEST:SIM:M14")
     t0 = time.perf_counter()
     pv_epics = m_epics.PV("VAL", connect=True, timeout=2.0)
     t1 = time.perf_counter()
 
-    # version "fast" (ton Motor)
-    m_fast = Motor("TEST:SIM:M5")
+    m_fast = Motor("TEST:SIM:M15")
     t2 = time.perf_counter()
-    pv_fast = m_fast.PV("VAL", connect=False)  # volontairement non connecté
+    pv_fast = m_fast.PV("VAL", connect=False) 
     t3 = time.perf_counter()
 
     assert pv_epics.connected