diff --git a/crates/ruff_linter/src/rules/flake8_import_conventions/mod.rs b/crates/ruff_linter/src/rules/flake8_import_conventions/mod.rs
index 04cf96d3f0..073fe18bb6 100644
--- a/crates/ruff_linter/src/rules/flake8_import_conventions/mod.rs
+++ b/crates/ruff_linter/src/rules/flake8_import_conventions/mod.rs
@@ -9,27 +9,44 @@ mod tests {
     use anyhow::Result;
     use rustc_hash::{FxHashMap, FxHashSet};
 
-    use crate::assert_diagnostics;
     use crate::registry::Rule;
     use crate::rules::flake8_import_conventions::settings::{BannedAliases, default_aliases};
     use crate::settings::{LinterSettings, types::PreviewMode};
     use crate::test::test_path;
+    use crate::{assert_diagnostics, assert_diagnostics_diff};
 
     #[test]
     fn defaults() -> Result<()> {
-        let settings = LinterSettings {
-            flake8_import_conventions: super::settings::Settings::new(PreviewMode::Enabled),
-            preview: PreviewMode::Enabled,
-            ..LinterSettings::for_rules([Rule::UnconventionalImportAlias, Rule::BannedImportAlias])
-        };
         let diagnostics = test_path(
             Path::new("flake8_import_conventions/defaults.py"),
-            &settings,
+            &LinterSettings::for_rule(Rule::UnconventionalImportAlias),
         )?;
         assert_diagnostics!(diagnostics);
         Ok(())
     }
 
+    #[test]
+    fn defaults_preview() -> Result<()> {
+        assert_diagnostics_diff!(
+            Path::new("flake8_import_conventions/defaults.py"),
+            &LinterSettings {
+                flake8_import_conventions: super::settings::Settings::new(PreviewMode::Disabled),
+                ..LinterSettings::for_rules([
+                    Rule::UnconventionalImportAlias,
+                    Rule::BannedImportAlias
+                ])
+            },
+            &LinterSettings {
+                flake8_import_conventions: super::settings::Settings::new(PreviewMode::Enabled),
+                ..LinterSettings::for_rules([
+                    Rule::UnconventionalImportAlias,
+                    Rule::BannedImportAlias
+                ])
+            },
+        );
+        Ok(())
+    }
+
     #[test]
     fn custom() -> Result<()> {
         let mut aliases = default_aliases();
diff --git a/crates/ruff_linter/src/rules/flake8_import_conventions/snapshots/ruff_linter__rules__flake8_import_conventions__tests__defaults.snap b/crates/ruff_linter/src/rules/flake8_import_conventions/snapshots/ruff_linter__rules__flake8_import_conventions__tests__defaults.snap
index b540824e9b..52708a8b47 100644
--- a/crates/ruff_linter/src/rules/flake8_import_conventions/snapshots/ruff_linter__rules__flake8_import_conventions__tests__defaults.snap
+++ b/crates/ruff_linter/src/rules/flake8_import_conventions/snapshots/ruff_linter__rules__flake8_import_conventions__tests__defaults.snap
@@ -277,33 +277,3 @@ help: Alias `networkx` to `nx`
 24 | 
 25 | def conventional_aliases():
 note: This is an unsafe fix and may change runtime behavior
-
-ICN001 `plotly.graph_objects` should be imported as `go`
-  --> defaults.py:36:8
-   |
-35 | # ICN001: plotly.graph_objects should be imported as go
-36 | import plotly.graph_objects  # should require alias
-   |        ^^^^^^^^^^^^^^^^^^^^
-37 | import plotly.graph_objects as go  # ok
-   |
-help: Alias `plotly.graph_objects` to `go`
-
-ICN001 `statsmodels.api` should be imported as `sm`
-  --> defaults.py:40:8
-   |
-39 | # ICN001: statsmodels.api should be imported as sm
-40 | import statsmodels.api  # should require alias
-   |        ^^^^^^^^^^^^^^^
-41 | import statsmodels.api as sm  # ok
-   |
-help: Alias `statsmodels.api` to `sm`
-
-ICN002 `geopandas` should not be imported as `gpd`
-  --> defaults.py:44:1
-   |
-43 | # ICN002: geopandas should not be imported as gpd
-44 | import geopandas as gpd  # banned
-   | ^^^^^^^^^^^^^^^^^^^^^^^
-45 | import geopandas  # ok
-46 | import geopandas as gdf  # ok
-   |
diff --git a/crates/ruff_linter/src/rules/flake8_import_conventions/snapshots/ruff_linter__rules__flake8_import_conventions__tests__defaults_preview.snap b/crates/ruff_linter/src/rules/flake8_import_conventions/snapshots/ruff_linter__rules__flake8_import_conventions__tests__defaults_preview.snap
new file mode 100644
index 0000000000..b56ab7fca7
--- /dev/null
+++ b/crates/ruff_linter/src/rules/flake8_import_conventions/snapshots/ruff_linter__rules__flake8_import_conventions__tests__defaults_preview.snap
@@ -0,0 +1,47 @@
+---
+source: crates/ruff_linter/src/rules/flake8_import_conventions/mod.rs
+---
+--- Linter settings ---
++	plotly.graph_objects = go,
++	statsmodels.api = sm,
+-linter.flake8_import_conventions.banned_aliases = {}
++linter.flake8_import_conventions.banned_aliases = {
++	geopandas = [gpd],
++}
+
+--- Summary ---
+Removed: 0
+Added: 3
+
+--- Added ---
+ICN001 `plotly.graph_objects` should be imported as `go`
+  --> defaults.py:36:8
+   |
+35 | # ICN001: plotly.graph_objects should be imported as go
+36 | import plotly.graph_objects  # should require alias
+   |        ^^^^^^^^^^^^^^^^^^^^
+37 | import plotly.graph_objects as go  # ok
+   |
+help: Alias `plotly.graph_objects` to `go`
+
+
+ICN001 `statsmodels.api` should be imported as `sm`
+  --> defaults.py:40:8
+   |
+39 | # ICN001: statsmodels.api should be imported as sm
+40 | import statsmodels.api  # should require alias
+   |        ^^^^^^^^^^^^^^^
+41 | import statsmodels.api as sm  # ok
+   |
+help: Alias `statsmodels.api` to `sm`
+
+
+ICN002 `geopandas` should not be imported as `gpd`
+  --> defaults.py:44:1
+   |
+43 | # ICN002: geopandas should not be imported as gpd
+44 | import geopandas as gpd  # banned
+   | ^^^^^^^^^^^^^^^^^^^^^^^
+45 | import geopandas  # ok
+46 | import geopandas as gdf  # ok
+   |