diff --git a/backend/cache/cache_internal_test.go b/backend/cache/cache_internal_test.go
index b6ee2a057..eb2a010de 100644
--- a/backend/cache/cache_internal_test.go
+++ b/backend/cache/cache_internal_test.go
@@ -1,4 +1,5 @@
 // +build !plan9
+// +build !race
 
 package cache_test
 
diff --git a/backend/cache/cache_mount_other_test.go b/backend/cache/cache_mount_other_test.go
index 086428569..fc1f61260 100644
--- a/backend/cache/cache_mount_other_test.go
+++ b/backend/cache/cache_mount_other_test.go
@@ -2,6 +2,7 @@
 // +build !darwin !go1.13
 // +build !freebsd !go1.13
 // +build !windows
+// +build !race
 
 package cache_test
 
diff --git a/backend/cache/cache_mount_unix_test.go b/backend/cache/cache_mount_unix_test.go
index 47927bd5f..b91f4bc9e 100644
--- a/backend/cache/cache_mount_unix_test.go
+++ b/backend/cache/cache_mount_unix_test.go
@@ -1,4 +1,5 @@
 // +build linux,go1.13 darwin,go1.13 freebsd,go1.13
+// +build !race
 
 package cache_test
 
diff --git a/backend/cache/cache_mount_windows_test.go b/backend/cache/cache_mount_windows_test.go
index d65dd17e8..0210209dc 100644
--- a/backend/cache/cache_mount_windows_test.go
+++ b/backend/cache/cache_mount_windows_test.go
@@ -1,4 +1,5 @@
 // +build windows
+// +build !race
 
 package cache_test
 
diff --git a/backend/cache/cache_test.go b/backend/cache/cache_test.go
index 5174c0bc4..7f9175861 100644
--- a/backend/cache/cache_test.go
+++ b/backend/cache/cache_test.go
@@ -1,6 +1,7 @@
 // Test Cache filesystem interface
 
 // +build !plan9
+// +build !race
 
 package cache_test
 
diff --git a/backend/cache/cache_upload_test.go b/backend/cache/cache_upload_test.go
index dec5de9bc..f1e3252c3 100644
--- a/backend/cache/cache_upload_test.go
+++ b/backend/cache/cache_upload_test.go
@@ -1,4 +1,5 @@
 // +build !plan9
+// +build !race
 
 package cache_test