diff --git a/src/instruments/thorlabs/lcc25.py b/src/instruments/thorlabs/lcc25.py
index f4ab4ef9..69051b6c 100644
--- a/src/instruments/thorlabs/lcc25.py
+++ b/src/instruments/thorlabs/lcc25.py
@@ -133,7 +133,7 @@ def name(self):
     voltage1 = unitful_property(
         "volt1",
         u.V,
-        format_code="{:.1f}",
+        format_code="{:.3f}",
         set_fmt="{}={}",
         valid_range=(0, 25),
         doc="""
@@ -148,7 +148,7 @@ def name(self):
     voltage2 = unitful_property(
         "volt2",
         u.V,
-        format_code="{:.1f}",
+        format_code="{:.3f}",
         set_fmt="{}={}",
         valid_range=(0, 25),
         doc="""
@@ -163,7 +163,7 @@ def name(self):
     min_voltage = unitful_property(
         "min",
         u.V,
-        format_code="{:.1f}",
+        format_code="{:.3f}",
         set_fmt="{}={}",
         valid_range=(0, 25),
         doc="""
@@ -178,7 +178,7 @@ def name(self):
     max_voltage = unitful_property(
         "max",
         u.V,
-        format_code="{:.1f}",
+        format_code="{:.3f}",
         set_fmt="{}={}",
         valid_range=(0, 25),
         doc="""
@@ -209,7 +209,7 @@ def name(self):
     increment = unitful_property(
         "increment",
         units=u.V,
-        format_code="{:.1f}",
+        format_code="{:.3f}",
         set_fmt="{}={}",
         valid_range=(0, None),
         doc="""
diff --git a/tests/test_thorlabs/test_thorlabs_lcc25.py b/tests/test_thorlabs/test_thorlabs_lcc25.py
index 5cc9bf1b..f09f1823 100644
--- a/tests/test_thorlabs/test_thorlabs_lcc25.py
+++ b/tests/test_thorlabs/test_thorlabs_lcc25.py
@@ -115,8 +115,8 @@ def test_tc200_remote_invalid_type():
 def test_lcc25_voltage1():
     with expected_protocol(
         ik.thorlabs.LCC25,
-        ["volt1?", "volt1=10.0"],
-        ["volt1?", "20", "> volt1=10.0", "> "],
+        ["volt1?", "volt1=10.000"],
+        ["volt1?", "20", "> volt1=10.000", "> "],
         sep="\r",
     ) as lcc:
         unit_eq(lcc.voltage1, u.Quantity(20, "V"))
@@ -134,9 +134,9 @@ def test_lcc25_voltage2():
         ik.thorlabs.LCC25,
         [
             "volt2?",
-            "volt2=10.0",
+            "volt2=10.000",
         ],
-        ["volt2?", "20", "> volt2=10.0", "> "],
+        ["volt2?", "20", "> volt2=10.000", "> "],
         sep="\r",
     ) as lcc:
         unit_eq(lcc.voltage2, u.Quantity(20, "V"))
@@ -146,8 +146,8 @@ def test_lcc25_voltage2():
 def test_lcc25_minvoltage():
     with expected_protocol(
         ik.thorlabs.LCC25,
-        ["min?", "min=10.0"],
-        ["min?", "20", "> min=10.0", "> "],
+        ["min?", "min=10.000"],
+        ["min?", "20", "> min=10.000", "> "],
         sep="\r",
     ) as lcc:
         unit_eq(lcc.min_voltage, u.Quantity(20, "V"))
@@ -157,8 +157,8 @@ def test_lcc25_minvoltage():
 def test_lcc25_maxvoltage():
     with expected_protocol(
         ik.thorlabs.LCC25,
-        ["max?", "max=10.0"],
-        ["max?", "20", "> max=10.0", "> "],
+        ["max?", "max=10.000"],
+        ["max?", "20", "> max=10.000", "> "],
         sep="\r",
     ) as lcc:
         unit_eq(lcc.max_voltage, u.Quantity(20, "V"))
@@ -186,8 +186,8 @@ def test_lcc25_dwell_positive():
 def test_lcc25_increment():
     with expected_protocol(
         ik.thorlabs.LCC25,
-        ["increment?", "increment=10.0"],
-        ["increment?", "20", "> increment=10.0", "> "],
+        ["increment?", "increment=10.000"],
+        ["increment?", "20", "> increment=10.000", "> "],
         sep="\r",
     ) as lcc:
         unit_eq(lcc.increment, u.Quantity(20, "V"))