diff --git a/lib/linguist/blob_helper.rb b/lib/linguist/blob_helper.rb
index c164d768..d7c70b4f 100644
--- a/lib/linguist/blob_helper.rb
+++ b/lib/linguist/blob_helper.rb
@@ -146,7 +146,8 @@ module Linguist
     #
     # Return true or false
     def shebang_extname?
-      extname.empty?
+      extname.empty? &&
+        (mode.to_i(8) & 05) == 05
     end
 
     MEGABYTE = 1024 * 1024
diff --git a/lib/linguist/file_blob.rb b/lib/linguist/file_blob.rb
index 7dbecb42..7e7f1acd 100644
--- a/lib/linguist/file_blob.rb
+++ b/lib/linguist/file_blob.rb
@@ -32,6 +32,13 @@ module Linguist
     # Returns a String
     attr_reader :name
 
+    # Public: Read file permissions
+    #
+    # Returns a String like '100644'
+    def mode
+      File.stat(@path).mode.to_s(8)
+    end
+
     # Public: Read file contents.
     #
     # Returns a String.
diff --git a/test/fixtures/script.bash b/test/fixtures/script.bash
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.foo b/test/fixtures/script.foo
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.groovy b/test/fixtures/script.groovy
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.js b/test/fixtures/script.js
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.mrb b/test/fixtures/script.mrb
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new mode 100755
diff --git a/test/fixtures/script.nu b/test/fixtures/script.nu
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new mode 100755
diff --git a/test/fixtures/script.pl b/test/fixtures/script.pl
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.py b/test/fixtures/script.py
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.rake b/test/fixtures/script.rake
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.rb b/test/fixtures/script.rb
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.rkt b/test/fixtures/script.rkt
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.scala b/test/fixtures/script.scala
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.sh b/test/fixtures/script.sh
old mode 100644
new mode 100755
diff --git a/test/fixtures/script.zsh b/test/fixtures/script.zsh
old mode 100644
new mode 100755