diff --git a/setup.py b/setup.py
old mode 100644
new mode 100755
diff --git a/test/bist_async_tb.py b/test/bist_async_tb.py
old mode 100644
new mode 100755
index b0c70e6..365881b
--- a/test/bist_async_tb.py
+++ b/test/bist_async_tb.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from litex.gen import *
 
 from litex.soc.interconnect.stream import *
diff --git a/test/bist_tb.py b/test/bist_tb.py
old mode 100644
new mode 100755
index ab23f92..bddbfa4
--- a/test/bist_tb.py
+++ b/test/bist_tb.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from litex.gen import *
 
 from litex.soc.interconnect.stream import *
diff --git a/test/downconverter_tb.py b/test/downconverter_tb.py
old mode 100644
new mode 100755
index d903d06..d8d7900
--- a/test/downconverter_tb.py
+++ b/test/downconverter_tb.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from litex.gen import *
 
 from litex.soc.interconnect.stream import *
diff --git a/test/upconverter_tb.py b/test/upconverter_tb.py
old mode 100644
new mode 100755
index 39b9878..1f7ac55
--- a/test/upconverter_tb.py
+++ b/test/upconverter_tb.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from litex.gen import *
 
 from litex.soc.interconnect.stream import *