diff --git a/.gitignore b/.gitignore
index 9e75b21d8..d134aa5bf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,5 @@
 build/
 /captures
 .externalNativeBuild
-local.properties
\ No newline at end of file
+local.properties
+.kotlin/
diff --git a/AccessibilityCodelab/.gitignore b/AccessibilityCodelab/.gitignore
index d4cb42576..4a708a497 100644
--- a/AccessibilityCodelab/.gitignore
+++ b/AccessibilityCodelab/.gitignore
@@ -8,4 +8,5 @@
 .externalNativeBuild
 .cxx
 local.properties
-/buildSrc/.gradle/*
\ No newline at end of file
+/buildSrc/.gradle/*
+.kotlin/
diff --git a/AdaptiveUiCodelab/.gitignore b/AdaptiveUiCodelab/.gitignore
index a0518f1fa..4a708a497 100644
--- a/AdaptiveUiCodelab/.gitignore
+++ b/AdaptiveUiCodelab/.gitignore
@@ -9,3 +9,4 @@
 .cxx
 local.properties
 /buildSrc/.gradle/*
+.kotlin/
diff --git a/AdvancedStateAndSideEffectsCodelab/.gitignore b/AdvancedStateAndSideEffectsCodelab/.gitignore
index d4cb42576..4a708a497 100644
--- a/AdvancedStateAndSideEffectsCodelab/.gitignore
+++ b/AdvancedStateAndSideEffectsCodelab/.gitignore
@@ -8,4 +8,5 @@
 .externalNativeBuild
 .cxx
 local.properties
-/buildSrc/.gradle/*
\ No newline at end of file
+/buildSrc/.gradle/*
+.kotlin/
diff --git a/BasicLayoutsCodelab/.gitignore b/BasicLayoutsCodelab/.gitignore
index d4cb42576..4a708a497 100644
--- a/BasicLayoutsCodelab/.gitignore
+++ b/BasicLayoutsCodelab/.gitignore
@@ -8,4 +8,5 @@
 .externalNativeBuild
 .cxx
 local.properties
-/buildSrc/.gradle/*
\ No newline at end of file
+/buildSrc/.gradle/*
+.kotlin/
diff --git a/MigrationCodelab/.gitignore b/MigrationCodelab/.gitignore
index fd5a88f13..abb0bb836 100644
--- a/MigrationCodelab/.gitignore
+++ b/MigrationCodelab/.gitignore
@@ -6,4 +6,5 @@
 /build
 /captures
 .externalNativeBuild
-ktlint
\ No newline at end of file
+ktlint
+.kotlin/
diff --git a/NavigationCodelab/.gitignore b/NavigationCodelab/.gitignore
index 6e22c654d..fee255bb9 100644
--- a/NavigationCodelab/.gitignore
+++ b/NavigationCodelab/.gitignore
@@ -14,3 +14,4 @@
 .externalNativeBuild
 .cxx
 local.properties
+.kotlin/
diff --git a/PerformanceCodelab/.gitignore b/PerformanceCodelab/.gitignore
index 0180d7747..c4ffc6b68 100644
--- a/PerformanceCodelab/.gitignore
+++ b/PerformanceCodelab/.gitignore
@@ -14,3 +14,4 @@ local.properties
 /captures
 .externalNativeBuild
 .cxx
+.kotlin/
diff --git a/TestingCodelab/.gitignore b/TestingCodelab/.gitignore
index a0518f1fa..4a708a497 100644
--- a/TestingCodelab/.gitignore
+++ b/TestingCodelab/.gitignore
@@ -9,3 +9,4 @@
 .cxx
 local.properties
 /buildSrc/.gradle/*
+.kotlin/
diff --git a/ThemingCodelab/.gitignore b/ThemingCodelab/.gitignore
index 050d01186..6c22b5b2d 100644
--- a/ThemingCodelab/.gitignore
+++ b/ThemingCodelab/.gitignore
@@ -8,3 +8,4 @@
 .externalNativeBuild
 .cxx
 local.properties
+.kotlin/