diff --git a/test/parallel/test-fs-readfile-pipe-large.js b/test/parallel/test-fs-readfile-pipe-large.js
index 66f955a5614378..99e4bfada8a55e 100644
--- a/test/parallel/test-fs-readfile-pipe-large.js
+++ b/test/parallel/test-fs-readfile-pipe-large.js
@@ -12,11 +12,6 @@ if (process.platform === 'win32') {
 
 var fs = require('fs');
 
-var filename = path.join(common.tmpDir, '/readfile_pipe_large_test.txt');
-var dataExpected = new Array(1000000).join('a');
-common.refreshTmpDir();
-fs.writeFileSync(filename, dataExpected);
-
 if (process.argv[2] === 'child') {
   fs.readFile('/dev/stdin', function(er, data) {
     if (er) throw er;
@@ -25,6 +20,11 @@ if (process.argv[2] === 'child') {
   return;
 }
 
+var filename = path.join(common.tmpDir, '/readfile_pipe_large_test.txt');
+var dataExpected = new Array(1000000).join('a');
+common.refreshTmpDir();
+fs.writeFileSync(filename, dataExpected);
+
 var exec = require('child_process').exec;
 var f = JSON.stringify(__filename);
 var node = JSON.stringify(process.execPath);
diff --git a/test/parallel/test-fs-readfilesync-pipe-large.js b/test/parallel/test-fs-readfilesync-pipe-large.js
index e9045b27f1789d..9b0b6b4299ec56 100644
--- a/test/parallel/test-fs-readfilesync-pipe-large.js
+++ b/test/parallel/test-fs-readfilesync-pipe-large.js
@@ -12,16 +12,16 @@ if (process.platform === 'win32') {
 
 var fs = require('fs');
 
-var filename = path.join(common.tmpDir, '/readfilesync_pipe_large_test.txt');
-var dataExpected = new Array(1000000).join('a');
-common.refreshTmpDir();
-fs.writeFileSync(filename, dataExpected);
-
 if (process.argv[2] === 'child') {
   process.stdout.write(fs.readFileSync('/dev/stdin', 'utf8'));
   return;
 }
 
+var filename = path.join(common.tmpDir, '/readfilesync_pipe_large_test.txt');
+var dataExpected = new Array(1000000).join('a');
+common.refreshTmpDir();
+fs.writeFileSync(filename, dataExpected);
+
 var exec = require('child_process').exec;
 var f = JSON.stringify(__filename);
 var node = JSON.stringify(process.execPath);