diff --git a/crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/lambda_preview.options.json b/crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/lambda_preview.options.json
deleted file mode 100644
index 8925dd0a82..0000000000
--- a/crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/lambda_preview.options.json
+++ /dev/null
@@ -1,5 +0,0 @@
-[
-  {
-    "preview": "enabled"
-  }
-]
diff --git a/crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/lambda_preview.py b/crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/lambda_preview.py
deleted file mode 100644
index 819ab48b32..0000000000
--- a/crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/lambda_preview.py
+++ /dev/null
@@ -1,24 +0,0 @@
-"""
-Test cases from lambda.py that cause an instability in the stable
-implementation but that are handled by the preview `indent_lambda_parameters`
-version.
-"""
-
-(
-    lambda
-    # comment 1
-    *
-    # comment 2
-    x,
-    **y:
-    # comment 3
-    x
-)
-
-(
-    lambda # comment 1
-        * # comment 2
-        x,
-        y: # comment 3
-    x
-)
diff --git a/crates/ruff_python_formatter/tests/snapshots/format@expression__lambda_preview.py.snap b/crates/ruff_python_formatter/tests/snapshots/format@expression__lambda_preview.py.snap
deleted file mode 100644
index eeb6fa2c36..0000000000
--- a/crates/ruff_python_formatter/tests/snapshots/format@expression__lambda_preview.py.snap
+++ /dev/null
@@ -1,75 +0,0 @@
----
-source: crates/ruff_python_formatter/tests/fixtures.rs
-input_file: crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/lambda_preview.py
----
-## Input
-```python
-"""
-Test cases from lambda.py that cause an instability in the stable
-implementation but that are handled by the preview `indent_lambda_parameters`
-version.
-"""
-
-(
-    lambda
-    # comment 1
-    *
-    # comment 2
-    x,
-    **y:
-    # comment 3
-    x
-)
-
-(
-    lambda # comment 1
-        * # comment 2
-        x,
-        y: # comment 3
-    x
-)
-```
-
-## Outputs
-### Output 1
-```
-indent-style               = space
-line-width                 = 88
-indent-width               = 4
-quote-style                = Double
-line-ending                = LineFeed
-magic-trailing-comma       = Respect
-docstring-code             = Disabled
-docstring-code-line-width  = "dynamic"
-preview                    = Enabled
-target_version             = 3.10
-source_type                = Python
-```
-
-```python
-"""
-Test cases from lambda.py that cause an instability in the stable
-implementation but that are handled by the preview `indent_lambda_parameters`
-version.
-"""
-
-(
-    lambda
-        # comment 1
-        # comment 2
-        *x,
-        **y
-    :
-    # comment 3
-    x
-)
-
-(
-    lambda  # comment 1
-        # comment 2
-        *x,
-        y
-    :  # comment 3
-    x
-)
-```