diff --git a/src/cwl_utils/cwl_v1_0_expression_refactor.py b/src/cwl_utils/cwl_v1_0_expression_refactor.py
index d584224e..854a9f21 100755
--- a/src/cwl_utils/cwl_v1_0_expression_refactor.py
+++ b/src/cwl_utils/cwl_v1_0_expression_refactor.py
@@ -5,7 +5,6 @@
 
 import copy
 import hashlib
-import uuid
 from collections.abc import MutableSequence, Sequence
 from contextlib import suppress
 from typing import Any, cast, Final
@@ -294,6 +293,7 @@ def traverse(
                 run=copy.deepcopy(process),
             )
             workflow = cwl.Workflow(
+                id=process.id,
                 inputs=wf_inputs,
                 outputs=wf_outputs,
                 steps=[step],
@@ -409,7 +409,6 @@ def generate_etool_from_expr(
         else None
     )
     return cwl.ExpressionTool(
-        id="_:" + str(uuid.uuid4()),
         inputs=inputs,
         outputs=outputs,
         expression=expression,
@@ -1732,7 +1731,6 @@ def generate_etool_from_expr2(
  }"""
     )
     return cwl.ExpressionTool(
-        id="_:" + str(uuid.uuid4()),
         inputs=inputs,
         outputs=outputs,
         expression=expression,
diff --git a/src/cwl_utils/cwl_v1_1_expression_refactor.py b/src/cwl_utils/cwl_v1_1_expression_refactor.py
index 685520e7..fba3babe 100755
--- a/src/cwl_utils/cwl_v1_1_expression_refactor.py
+++ b/src/cwl_utils/cwl_v1_1_expression_refactor.py
@@ -5,7 +5,6 @@
 
 import copy
 import hashlib
-import uuid
 from collections.abc import MutableSequence, Sequence
 from contextlib import suppress
 from typing import Any, cast, Final
@@ -294,6 +293,7 @@ def traverse(
                 run=copy.deepcopy(process),
             )
             workflow = cwl.Workflow(
+                id=process.id,
                 inputs=wf_inputs,
                 outputs=wf_outputs,
                 steps=[step],
@@ -407,7 +407,6 @@ def generate_etool_from_expr(
         else None
     )
     return cwl.ExpressionTool(
-        id="_:" + str(uuid.uuid4()),
         inputs=inputs,
         outputs=outputs,
         expression=expression,
@@ -1738,7 +1737,6 @@ def generate_etool_from_expr2(
  }"""
     )
     return cwl.ExpressionTool(
-        id="_:" + str(uuid.uuid4()),
         inputs=inputs,
         outputs=outputs,
         expression=expression,
diff --git a/src/cwl_utils/cwl_v1_2_expression_refactor.py b/src/cwl_utils/cwl_v1_2_expression_refactor.py
index eca589a6..2a4ca6da 100755
--- a/src/cwl_utils/cwl_v1_2_expression_refactor.py
+++ b/src/cwl_utils/cwl_v1_2_expression_refactor.py
@@ -5,7 +5,6 @@
 
 import copy
 import hashlib
-import uuid
 from collections.abc import Mapping, MutableSequence, Sequence
 from contextlib import suppress
 from typing import Any, cast, Final
@@ -295,6 +294,7 @@ def traverse(
                 run=copy.deepcopy(process),
             )
             workflow = cwl.Workflow(
+                id=process.id,
                 inputs=wf_inputs,
                 outputs=wf_outputs,
                 steps=[step],
@@ -408,7 +408,6 @@ def generate_etool_from_expr(
         else None
     )
     return cwl.ExpressionTool(
-        id="_:" + str(uuid.uuid4()),
         inputs=inputs,
         outputs=outputs,
         expression=expression,
@@ -1851,7 +1850,6 @@ def generate_etool_from_expr2(
  }"""
     )
     return cwl.ExpressionTool(
-        id="_:" + str(uuid.uuid4()),
         inputs=inputs,
         outputs=outputs,
         expression=expression,