diff --git a/fstest/test_all/clean.go b/fstest/test_all/clean.go
index 8ce451bdc..c4a980732 100644
--- a/fstest/test_all/clean.go
+++ b/fstest/test_all/clean.go
@@ -1,5 +1,7 @@
 // Clean the left over test files
 
+// +build go1.10
+
 package main
 
 import (
diff --git a/fstest/test_all/config.go b/fstest/test_all/config.go
index 122e4ecb2..8265ce4fc 100644
--- a/fstest/test_all/config.go
+++ b/fstest/test_all/config.go
@@ -1,5 +1,7 @@
 // Config handling
 
+// +build go1.10
+
 package main
 
 import (
diff --git a/fstest/test_all/report.go b/fstest/test_all/report.go
index ddc2167c1..5315dc6b5 100644
--- a/fstest/test_all/report.go
+++ b/fstest/test_all/report.go
@@ -1,3 +1,5 @@
+// +build go1.10
+
 package main
 
 import (
diff --git a/fstest/test_all/run.go b/fstest/test_all/run.go
index ea7046838..ea10b385d 100644
--- a/fstest/test_all/run.go
+++ b/fstest/test_all/run.go
@@ -1,5 +1,7 @@
 // Run a test
 
+// +build go1.10
+
 package main
 
 import (
diff --git a/fstest/test_all/test_all.go b/fstest/test_all/test_all.go
index 64de856a3..2bf7dcbda 100644
--- a/fstest/test_all/test_all.go
+++ b/fstest/test_all/test_all.go
@@ -1,7 +1,10 @@
+// +build go1.10
+
 // Run tests for all the remotes.  Run this with package names which
 // need integration testing.
 //
 // See the `test` target in the Makefile.
+//
 package main
 
 /* FIXME