diff --git a/src/atopile/assertions.py b/src/atopile/assertions.py
index 42bade24..49a32d62 100644
--- a/src/atopile/assertions.py
+++ b/src/atopile/assertions.py
@@ -450,7 +450,6 @@ def simplify_expressions(entry_addr: address.AddrStr):
             assertion.rhs = expressions.Expression.from_numericish(
                 expressions.simplify_expression(assertion.rhs, simplified_context)
             )
-    pass
 
 
 def _translator_factory(
diff --git a/src/atopile/expressions.py b/src/atopile/expressions.py
index 55d8d015..517a948b 100644
--- a/src/atopile/expressions.py
+++ b/src/atopile/expressions.py
@@ -183,8 +183,8 @@ def _f(val: float):
         tol, tol_unit = pretty_unit(self.tolerance * self.unit)
 
         if nom == 0:
-            return f"± {_f(tol)}{unit}"
-        if unit == tol_unit or nom == 0 or tol == 0:
+            return f"± {_f(tol)}{tol_unit}"
+        if unit == tol_unit:
             return f"{_f(nom)} ± {_f(tol)} {unit}"
         return f"{_f(nom)}{unit} ± {_f(tol)}{tol_unit}"
 
diff --git a/tests/test_expressions/test_ranged_values.py b/tests/test_expressions/test_ranged_values.py
index 00994fe6..cb746c28 100644
--- a/tests/test_expressions/test_ranged_values.py
+++ b/tests/test_expressions/test_ranged_values.py
@@ -53,6 +53,7 @@ def test_pretty_str():
     assert RangedValue(3, 3, pint.Unit("V"), str_rep=str_rep).pretty_str() == str_rep
     assert RangedValue(3, 3, pint.Unit("V")).pretty_str() == "3V"
     assert RangedValue(3, 5, pint.Unit("V")).pretty_str() == "3 to 5 V"
+    assert RangedValue(3, 5, pint.Unit("mV")).pretty_str() == "3 to 5 mV"
     assert RangedValue(3, 3.1, pint.Unit("V")).pretty_str() == "3.05V ± 50mV"
 
     # # Test Zeros
@@ -64,6 +65,7 @@ def test_pretty_str():
     assert RangedValue(-50, -48, pint.Unit("V")).pretty_str() == "-49 ± 1 V"
     assert RangedValue(-50, -30, pint.Unit("V")).pretty_str() == "-50 to -30 V"
     assert RangedValue(-50, 50, pint.Unit("V")).pretty_str() == "± 50V"
+    assert RangedValue(-50, 50, pint.Unit("mV")).pretty_str() == "± 50mV"
 
     # Make sure combined units compact properly
     v = RangedValue(3, 3, pint.Unit("V"))