diff --git a/src/sagemaker/local/pipeline.py b/src/sagemaker/local/pipeline.py
index c1d049de4d..4b9209fc0b 100644
--- a/src/sagemaker/local/pipeline.py
+++ b/src/sagemaker/local/pipeline.py
@@ -444,7 +444,7 @@ def _resolve_not_condition(self, not_condition: dict):
             True if given ConditionNot evaluated as true,
             False otherwise.
         """
-        return not self._resolve_condition(not_condition["Expression"])
+        return not self._resolve_condition(not_condition["Condition"])
 
     def _resolve_or_condition(self, or_condition: dict):
         """Resolve given ConditionOr.
diff --git a/src/sagemaker/workflow/conditions.py b/src/sagemaker/workflow/conditions.py
index 4cdec057f4..4b4996a7fa 100644
--- a/src/sagemaker/workflow/conditions.py
+++ b/src/sagemaker/workflow/conditions.py
@@ -259,7 +259,7 @@ def __init__(self, expression: Condition):
 
     def to_request(self) -> RequestType:
         """Get the request structure for workflow service calls."""
-        return {"Type": self.condition_type.value, "Expression": self.expression.to_request()}
+        return {"Type": self.condition_type.value, "Condition": self.expression.to_request()}
 
     @property
     def _referenced_steps(self) -> List[str]:
diff --git a/tests/integ/sagemaker/workflow/test_fail_steps.py b/tests/integ/sagemaker/workflow/test_fail_steps.py
index 5f8c1e04ab..af9ed5368e 100644
--- a/tests/integ/sagemaker/workflow/test_fail_steps.py
+++ b/tests/integ/sagemaker/workflow/test_fail_steps.py
@@ -17,7 +17,7 @@
 from tests.integ.sagemaker.workflow.helpers import wait_pipeline_execution
 from sagemaker import get_execution_role, utils
 from sagemaker.workflow.condition_step import ConditionStep
-from sagemaker.workflow.conditions import ConditionEquals
+from sagemaker.workflow.conditions import ConditionEquals, ConditionNot
 from sagemaker.workflow.fail_step import FailStep
 
 from sagemaker.workflow.functions import Join
@@ -37,14 +37,15 @@ def pipeline_name():
 
 def test_two_step_fail_pipeline_with_str_err_msg(sagemaker_session, role, pipeline_name):
     param = ParameterInteger(name="MyInt", default_value=2)
-    cond = ConditionEquals(left=param, right=1)
+    cond_equal = ConditionEquals(left=param, right=2)
+    cond_not_equal = ConditionNot(cond_equal)
     step_fail = FailStep(
         name="FailStep",
         error_message="Failed due to hitting in else branch",
     )
     step_cond = ConditionStep(
         name="CondStep",
-        conditions=[cond],
+        conditions=[cond_not_equal],
         if_steps=[],
         else_steps=[step_fail],
     )
diff --git a/tests/unit/sagemaker/workflow/test_condition_step.py b/tests/unit/sagemaker/workflow/test_condition_step.py
index 7ac335fbc3..315d549cce 100644
--- a/tests/unit/sagemaker/workflow/test_condition_step.py
+++ b/tests/unit/sagemaker/workflow/test_condition_step.py
@@ -202,7 +202,7 @@ def test_pipeline_condition_step_interpolated(sagemaker_session):
                         },
                         {
                             "Type": "Not",
-                            "Expression": {
+                            "Condition": {
                                 "Type": "Equals",
                                 "LeftValue": {"Get": "Parameters.MyInt1"},
                                 "RightValue": {"Get": "Parameters.MyInt2"},
@@ -210,7 +210,7 @@ def test_pipeline_condition_step_interpolated(sagemaker_session):
                         },
                         {
                             "Type": "Not",
-                            "Expression": {
+                            "Condition": {
                                 "Type": "In",
                                 "QueryValue": {"Get": "Parameters.MyStr"},
                                 "Values": ["abc", "def"],
@@ -533,9 +533,9 @@ def func2():
             assert len(step_dsl["Arguments"]["Conditions"]) == 1
             condition_dsl = step_dsl["Arguments"]["Conditions"][0]
             assert condition_dsl["Type"] == "Not"
-            cond_expr_dsl = condition_dsl["Expression"]
+            cond_expr_dsl = condition_dsl["Condition"]
             assert cond_expr_dsl["Type"] == "Not"
-            cond_inner_expr_dsl = cond_expr_dsl["Expression"]
+            cond_inner_expr_dsl = cond_expr_dsl["Condition"]
             assert cond_inner_expr_dsl["Type"] == "Or"
             assert len(cond_inner_expr_dsl["Conditions"]) == 2
             assert cond_inner_expr_dsl["Conditions"][0]["LeftValue"] == _get_expected_jsonget_expr(
@@ -602,7 +602,7 @@ def func4():
             assert len(step_dsl["Arguments"]["Conditions"]) == 1
             condition_dsl = step_dsl["Arguments"]["Conditions"][0]
             assert condition_dsl["Type"] == "Not"
-            cond_expr_dsl = condition_dsl["Expression"]
+            cond_expr_dsl = condition_dsl["Condition"]
             assert cond_expr_dsl["Type"] == "In"
             assert cond_expr_dsl["QueryValue"] == _get_expected_jsonget_expr(
                 step_name=step_output3._step.name, path="Result"
diff --git a/tests/unit/sagemaker/workflow/test_conditions.py b/tests/unit/sagemaker/workflow/test_conditions.py
index a7ec9c0c11..941a191856 100644
--- a/tests/unit/sagemaker/workflow/test_conditions.py
+++ b/tests/unit/sagemaker/workflow/test_conditions.py
@@ -122,7 +122,7 @@ def test_condition_not():
     cond_not = ConditionNot(expression=cond_eq)
     assert cond_not.to_request() == {
         "Type": "Not",
-        "Expression": {
+        "Condition": {
             "Type": "Equals",
             "LeftValue": param,
             "RightValue": "foo",
@@ -136,7 +136,7 @@ def test_condition_not_in():
     cond_not = ConditionNot(expression=cond_in)
     assert cond_not.to_request() == {
         "Type": "Not",
-        "Expression": {
+        "Condition": {
             "Type": "In",
             "QueryValue": param,
             "Values": ["abc", "def"],