diff --git a/contrib/index.rst b/contrib/index.rst
index e519c7dab..0e7c79ca1 100644
--- a/contrib/index.rst
+++ b/contrib/index.rst
@@ -4,14 +4,7 @@
 Python Contributor's Guide (draft)
 ==================================
 
-.. raw:: html
-
-    <script>
-    document.addEventListener('DOMContentLoaded', function() {
-      activateTab(getOS());
-    });
-    </script>
-
+.. include:: /include/activate-tab.rst
 
 .. important::
 
diff --git a/documentation/devguide.rst b/documentation/devguide.rst
index fc12c369f..74f734831 100644
--- a/documentation/devguide.rst
+++ b/documentation/devguide.rst
@@ -4,13 +4,7 @@
 Helping with the Developer's Guide
 ==================================
 
-.. raw:: html
-
-    <script>
-    document.addEventListener('DOMContentLoaded', function() {
-      activateTab(getOS());
-    });
-    </script>
+.. include:: /include/activate-tab.rst
 
 .. highlight:: console
 
diff --git a/documentation/start-documenting.rst b/documentation/start-documenting.rst
index 7865f125d..917cb30bf 100644
--- a/documentation/start-documenting.rst
+++ b/documentation/start-documenting.rst
@@ -5,13 +5,7 @@
 Getting started
 ===============
 
-.. raw:: html
-
-   <script>
-    document.addEventListener('DOMContentLoaded', function() {
-      activateTab(getOS());
-    });
-    </script>
+.. include:: /include/activate-tab.rst
 
 .. highlight::  rest
 
diff --git a/getting-started/git-boot-camp.rst b/getting-started/git-boot-camp.rst
index b845e00aa..6808e99b4 100644
--- a/getting-started/git-boot-camp.rst
+++ b/getting-started/git-boot-camp.rst
@@ -4,13 +4,7 @@
 Git bootcamp and cheat sheet
 ============================
 
-.. raw:: html
-
-    <script>
-    document.addEventListener('DOMContentLoaded', function() {
-      activateTab(getOS());
-    });
-    </script>
+.. include:: /include/activate-tab.rst
 
 .. highlight:: console
 
diff --git a/getting-started/setup-building.rst b/getting-started/setup-building.rst
index 110d718e9..ed7376a02 100644
--- a/getting-started/setup-building.rst
+++ b/getting-started/setup-building.rst
@@ -5,13 +5,7 @@
 Setup and building
 ==================
 
-.. raw:: html
-
-    <script>
-    document.addEventListener('DOMContentLoaded', function() {
-      activateTab(getOS());
-    });
-    </script>
+.. include:: /include/activate-tab.rst
 
 .. highlight:: console
 
diff --git a/include/activate-tab.rst b/include/activate-tab.rst
new file mode 100644
index 000000000..229542bf4
--- /dev/null
+++ b/include/activate-tab.rst
@@ -0,0 +1,7 @@
+.. raw:: html
+
+    <script>
+    document.addEventListener('DOMContentLoaded', function() {
+      activateTab(getOS());
+    });
+    </script>
diff --git a/index.rst b/index.rst
index 997f59932..d1369cac3 100644
--- a/index.rst
+++ b/index.rst
@@ -4,13 +4,7 @@
 Python Developer's Guide
 ========================
 
-.. raw:: html
-
-    <script>
-    document.addEventListener('DOMContentLoaded', function() {
-      activateTab(getOS());
-    });
-    </script>
+.. include:: include/activate-tab.rst
 
 .. highlight:: bash
 
diff --git a/testing/coverage.rst b/testing/coverage.rst
index c34bb5235..48c2efc98 100644
--- a/testing/coverage.rst
+++ b/testing/coverage.rst
@@ -4,13 +4,7 @@
 Increase test coverage
 ======================
 
-.. raw:: html
-
-    <script>
-    document.addEventListener('DOMContentLoaded', function() {
-      activateTab(getOS());
-    });
-    </script>
+.. include:: /include/activate-tab.rst
 
 Python development follows a practice that all semantic changes and additions
 to the language and :abbr:`stdlib (standard library)` are accompanied by
diff --git a/testing/run-write-tests.rst b/testing/run-write-tests.rst
index 34101bd2d..405d10f03 100644
--- a/testing/run-write-tests.rst
+++ b/testing/run-write-tests.rst
@@ -5,13 +5,7 @@
 Running and writing tests
 =========================
 
-.. raw:: html
-
-    <script>
-    document.addEventListener('DOMContentLoaded', function() {
-      activateTab(getOS());
-    });
-    </script>
+.. include:: /include/activate-tab.rst
 
 .. note::