diff --git a/template/pyproject.toml.jinja b/template/pyproject.toml.jinja
index 7b1e1b7..30a557e 100644
--- a/template/pyproject.toml.jinja
+++ b/template/pyproject.toml.jinja
@@ -234,6 +234,9 @@ known-first-party = ["{{ project_slug }}"]
 [tool.ruff.lint.pydocstyle]
 convention = "google"
 
+[tool.ty.src]
+include = ["{{ project_slug }}/", "tests/"]
+
 [tool.ty.terminal]
 error-on-warning = true
 output-format = "concise"
diff --git a/tests/template/__snapshots__/test_pyproject.ambr b/tests/template/__snapshots__/test_pyproject.ambr
index 354f644..3bb4fb3 100644
--- a/tests/template/__snapshots__/test_pyproject.ambr
+++ b/tests/template/__snapshots__/test_pyproject.ambr
@@ -210,6 +210,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -446,6 +449,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -646,6 +652,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -858,6 +867,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -1057,6 +1069,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -1268,6 +1283,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -1443,6 +1461,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -1630,6 +1651,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -1859,6 +1883,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -2100,6 +2127,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -2305,6 +2335,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -2522,6 +2555,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -2726,6 +2762,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -2942,6 +2981,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -3122,6 +3164,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -3314,6 +3359,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -3541,6 +3589,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -3780,6 +3831,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -3983,6 +4037,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -4198,6 +4255,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -4400,6 +4460,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -4614,6 +4677,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -4792,6 +4858,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -4982,6 +5051,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -5214,6 +5286,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -5458,6 +5533,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -5666,6 +5744,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -5886,6 +5967,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -6093,6 +6177,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -6312,6 +6399,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -6495,6 +6585,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -6690,6 +6783,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -6922,6 +7018,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -7142,6 +7241,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -7386,6 +7488,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -7618,6 +7723,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -7862,6 +7970,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"
@@ -8094,6 +8205,9 @@
   [tool.ruff.lint.pydocstyle]
   convention = "google"
   
+  [tool.ty.src]
+  include = ["pkfire/", "tests/"]
+  
   [tool.ty.terminal]
   error-on-warning = true
   output-format = "concise"