diff --git a/crates/ruff_linter/src/rules/flake8_pytest_style/rules/fixture.rs b/crates/ruff_linter/src/rules/flake8_pytest_style/rules/fixture.rs
index 2c7242ae3af84..9b227a46c10ff 100644
--- a/crates/ruff_linter/src/rules/flake8_pytest_style/rules/fixture.rs
+++ b/crates/ruff_linter/src/rules/flake8_pytest_style/rules/fixture.rs
@@ -34,6 +34,9 @@ use super::helpers::{
 /// Either removing those unnecessary parentheses _or_ requiring them for all
 /// fixtures is fine, but it's best to be consistent.
 ///
+/// In [preview], this rule defaults to removing unnecessary parentheses, to match
+/// the behavior of official pytest projects.
+///
 /// ## Example
 /// ```python
 /// import pytest
@@ -59,6 +62,8 @@ use super::helpers::{
 ///
 /// ## References
 /// - [`pytest` documentation: API Reference: Fixtures](https://docs.pytest.org/en/latest/reference/reference.html#fixtures-api)
+///
+/// [preview]: https://docs.astral.sh/ruff/preview/
 #[violation]
 pub struct PytestFixtureIncorrectParenthesesStyle {
     expected: Parentheses,
diff --git a/crates/ruff_linter/src/rules/flake8_pytest_style/rules/marks.rs b/crates/ruff_linter/src/rules/flake8_pytest_style/rules/marks.rs
index cc00f2c6ddba4..b3beac0119227 100644
--- a/crates/ruff_linter/src/rules/flake8_pytest_style/rules/marks.rs
+++ b/crates/ruff_linter/src/rules/flake8_pytest_style/rules/marks.rs
@@ -14,6 +14,9 @@ use super::helpers::get_mark_decorators;
 /// without parentheses, depending on the [`lint.flake8-pytest-style.mark-parentheses`]
 /// setting.
 ///
+/// In [preview], this rule defaults to removing unnecessary parentheses, to match
+/// the behavior of official pytest projects.
+///
 /// ## Why is this bad?
 /// If a `@pytest.mark.<marker>()` doesn't take any arguments, the parentheses are
 /// optional.
@@ -46,6 +49,8 @@ use super::helpers::get_mark_decorators;
 ///
 /// ## References
 /// - [`pytest` documentation: Marks](https://docs.pytest.org/en/latest/reference/reference.html#marks)
+///
+/// [preview]: https://docs.astral.sh/ruff/preview/
 #[violation]
 pub struct PytestIncorrectMarkParenthesesStyle {
     mark_name: String,
diff --git a/crates/ruff_linter/src/rules/flake8_pytest_style/settings.rs b/crates/ruff_linter/src/rules/flake8_pytest_style/settings.rs
index 50b08c48c1f91..85ff1147efbb2 100644
--- a/crates/ruff_linter/src/rules/flake8_pytest_style/settings.rs
+++ b/crates/ruff_linter/src/rules/flake8_pytest_style/settings.rs
@@ -6,7 +6,7 @@ use std::fmt::Formatter;
 use crate::display_settings;
 use ruff_macros::CacheKey;
 
-use crate::settings::types::IdentifierPattern;
+use crate::settings::types::{IdentifierPattern, PreviewMode};
 
 use super::types;
 
@@ -49,6 +49,20 @@ impl Default for Settings {
     }
 }
 
+impl Settings {
+    pub fn resolve_default(preview: PreviewMode) -> Self {
+        if preview.is_enabled() {
+            Self {
+                fixture_parentheses: false,
+                mark_parentheses: false,
+                ..Default::default()
+            }
+        } else {
+            Self::default()
+        }
+    }
+}
+
 impl fmt::Display for Settings {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         display_settings! {
diff --git a/crates/ruff_workspace/src/configuration.rs b/crates/ruff_workspace/src/configuration.rs
index 85f7b91056649..e4d16310639c2 100644
--- a/crates/ruff_workspace/src/configuration.rs
+++ b/crates/ruff_workspace/src/configuration.rs
@@ -23,7 +23,7 @@ use ruff_linter::line_width::{IndentWidth, LineLength};
 use ruff_linter::registry::RuleNamespace;
 use ruff_linter::registry::{Rule, RuleSet, INCOMPATIBLE_CODES};
 use ruff_linter::rule_selector::{PreviewOptions, Specificity};
-use ruff_linter::rules::pycodestyle;
+use ruff_linter::rules::{flake8_pytest_style, pycodestyle};
 use ruff_linter::settings::fix_safety_table::FixSafetyTable;
 use ruff_linter::settings::rule_table::RuleTable;
 use ruff_linter::settings::types::{
@@ -327,9 +327,13 @@ impl Configuration {
                     .unwrap_or_default(),
                 flake8_pytest_style: lint
                     .flake8_pytest_style
-                    .map(Flake8PytestStyleOptions::try_into_settings)
+                    .map(|options| {
+                        Flake8PytestStyleOptions::try_into_settings(options, lint_preview)
+                    })
                     .transpose()?
-                    .unwrap_or_default(),
+                    .unwrap_or_else(|| {
+                        flake8_pytest_style::settings::Settings::resolve_default(lint_preview)
+                    }),
                 flake8_quotes: lint
                     .flake8_quotes
                     .map(Flake8QuotesOptions::into_settings)
diff --git a/crates/ruff_workspace/src/options.rs b/crates/ruff_workspace/src/options.rs
index 38645d3008069..133ad5314c859 100644
--- a/crates/ruff_workspace/src/options.rs
+++ b/crates/ruff_workspace/src/options.rs
@@ -24,7 +24,7 @@ use ruff_linter::rules::{
     pycodestyle, pydocstyle, pyflakes, pylint, pyupgrade,
 };
 use ruff_linter::settings::types::{
-    IdentifierPattern, OutputFormat, PythonVersion, RequiredVersion,
+    IdentifierPattern, OutputFormat, PreviewMode, PythonVersion, RequiredVersion,
 };
 use ruff_linter::{warn_user_once, RuleSelector};
 use ruff_macros::{CombineOptions, OptionsMetadata};
@@ -1374,6 +1374,9 @@ pub struct Flake8PytestStyleOptions {
     /// default), `@pytest.fixture()` is valid and `@pytest.fixture` is
     /// invalid. If set to `false`, `@pytest.fixture` is valid and
     /// `@pytest.fixture()` is invalid.
+    ///
+    /// If [preview](https://docs.astral.sh/ruff/preview/) is enabled, defaults to
+    /// `false`.
     #[option(
         default = "true",
         value_type = "bool",
@@ -1457,6 +1460,9 @@ pub struct Flake8PytestStyleOptions {
     /// default), `@pytest.mark.foo()` is valid and `@pytest.mark.foo` is
     /// invalid. If set to `false`, `@pytest.fixture` is valid and
     /// `@pytest.mark.foo()` is invalid.
+    ///
+    /// If [preview](https://docs.astral.sh/ruff/preview/) is enabled, defaults to
+    /// `false`.
     #[option(
         default = "true",
         value_type = "bool",
@@ -1466,9 +1472,12 @@ pub struct Flake8PytestStyleOptions {
 }
 
 impl Flake8PytestStyleOptions {
-    pub fn try_into_settings(self) -> anyhow::Result<flake8_pytest_style::settings::Settings> {
+    pub fn try_into_settings(
+        self,
+        preview: PreviewMode,
+    ) -> anyhow::Result<flake8_pytest_style::settings::Settings> {
         Ok(flake8_pytest_style::settings::Settings {
-            fixture_parentheses: self.fixture_parentheses.unwrap_or(true),
+            fixture_parentheses: self.fixture_parentheses.unwrap_or(preview.is_disabled()),
             parametrize_names_type: self.parametrize_names_type.unwrap_or_default(),
             parametrize_values_type: self.parametrize_values_type.unwrap_or_default(),
             parametrize_values_row_type: self.parametrize_values_row_type.unwrap_or_default(),
@@ -1494,7 +1503,7 @@ impl Flake8PytestStyleOptions {
                 .transpose()
                 .map_err(SettingsError::InvalidRaisesExtendRequireMatchFor)?
                 .unwrap_or_default(),
-            mark_parentheses: self.mark_parentheses.unwrap_or(true),
+            mark_parentheses: self.mark_parentheses.unwrap_or(preview.is_disabled()),
         })
     }
 }
diff --git a/ruff.schema.json b/ruff.schema.json
index cfe10e3a4cbc7..3cb9dec7244f6 100644
--- a/ruff.schema.json
+++ b/ruff.schema.json
@@ -1093,14 +1093,14 @@
       "type": "object",
       "properties": {
         "fixture-parentheses": {
-          "description": "Boolean flag specifying whether `@pytest.fixture()` without parameters should have parentheses. If the option is set to `true` (the default), `@pytest.fixture()` is valid and `@pytest.fixture` is invalid. If set to `false`, `@pytest.fixture` is valid and `@pytest.fixture()` is invalid.",
+          "description": "Boolean flag specifying whether `@pytest.fixture()` without parameters should have parentheses. If the option is set to `true` (the default), `@pytest.fixture()` is valid and `@pytest.fixture` is invalid. If set to `false`, `@pytest.fixture` is valid and `@pytest.fixture()` is invalid.\n\nIf [preview](https://docs.astral.sh/ruff/preview/) is enabled, defaults to `false`.",
           "type": [
             "boolean",
             "null"
           ]
         },
         "mark-parentheses": {
-          "description": "Boolean flag specifying whether `@pytest.mark.foo()` without parameters should have parentheses. If the option is set to `true` (the default), `@pytest.mark.foo()` is valid and `@pytest.mark.foo` is invalid. If set to `false`, `@pytest.fixture` is valid and `@pytest.mark.foo()` is invalid.",
+          "description": "Boolean flag specifying whether `@pytest.mark.foo()` without parameters should have parentheses. If the option is set to `true` (the default), `@pytest.mark.foo()` is valid and `@pytest.mark.foo` is invalid. If set to `false`, `@pytest.fixture` is valid and `@pytest.mark.foo()` is invalid.\n\nIf [preview](https://docs.astral.sh/ruff/preview/) is enabled, defaults to `false`.",
           "type": [
             "boolean",
             "null"