diff --git a/llvm/docs/TestSuiteGuide.md b/llvm/docs/TestSuiteGuide.md
index fe7a2785c857..0d9bbacb0d91 100644
--- a/llvm/docs/TestSuiteGuide.md
+++ b/llvm/docs/TestSuiteGuide.md
@@ -17,7 +17,7 @@ Quickstart
 
    ```bash
    % mkdir venv
-   % virtualenv -p python2.7 venv
+   % virtualenv venv
    % . venv/bin/activate
    % pip install svn+http://llvm.org/svn/llvm-project/llvm/trunk/utils/lit
    % lit --version
diff --git a/llvm/tools/opt-viewer/opt-diff.py b/llvm/tools/opt-viewer/opt-diff.py
index f3bfd1860b91..36e81a5d569a 100755
--- a/llvm/tools/opt-viewer/opt-diff.py
+++ b/llvm/tools/opt-viewer/opt-diff.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python
 
 from __future__ import print_function
 
diff --git a/llvm/tools/opt-viewer/opt-stats.py b/llvm/tools/opt-viewer/opt-stats.py
index 03de23bdb275..f4ee3a7d44e6 100755
--- a/llvm/tools/opt-viewer/opt-stats.py
+++ b/llvm/tools/opt-viewer/opt-stats.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python
 
 from __future__ import print_function
 
diff --git a/llvm/tools/opt-viewer/opt-viewer.py b/llvm/tools/opt-viewer/opt-viewer.py
index b660fe360f7d..f6582506311c 100755
--- a/llvm/tools/opt-viewer/opt-viewer.py
+++ b/llvm/tools/opt-viewer/opt-viewer.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python
 
 from __future__ import print_function
 
diff --git a/llvm/tools/opt-viewer/optrecord.py b/llvm/tools/opt-viewer/optrecord.py
index 8cf22ee3f05c..0193d25704c5 100644
--- a/llvm/tools/opt-viewer/optrecord.py
+++ b/llvm/tools/opt-viewer/optrecord.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python
 
 from __future__ import print_function
 
diff --git a/llvm/utils/update_analyze_test_checks.py b/llvm/utils/update_analyze_test_checks.py
index 0463bc01982d..64e64e090afa 100755
--- a/llvm/utils/update_analyze_test_checks.py
+++ b/llvm/utils/update_analyze_test_checks.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python
 
 """A script to generate FileCheck statements for 'opt' analysis tests.
 
diff --git a/llvm/utils/update_llc_test_checks.py b/llvm/utils/update_llc_test_checks.py
index d85fed56c18c..960fee232dc8 100755
--- a/llvm/utils/update_llc_test_checks.py
+++ b/llvm/utils/update_llc_test_checks.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python
 
 """A test case update script.
 
diff --git a/llvm/utils/update_mca_test_checks.py b/llvm/utils/update_mca_test_checks.py
index 54d1cb443c35..06fd655ab795 100755
--- a/llvm/utils/update_mca_test_checks.py
+++ b/llvm/utils/update_mca_test_checks.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python
 
 """A test case update script.
 
diff --git a/llvm/utils/update_test_checks.py b/llvm/utils/update_test_checks.py
index f878d4781149..6d0bf0479c05 100755
--- a/llvm/utils/update_test_checks.py
+++ b/llvm/utils/update_test_checks.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python
 
 """A script to generate FileCheck statements for 'opt' regression tests.