diff --git a/Builds/Test.py b/Builds/Test.py
index 555f0ca45..b9d3768a6 100755
--- a/Builds/Test.py
+++ b/Builds/Test.py
@@ -264,17 +264,20 @@ def shell(cmd, args=(), silent=False):
     count = 0
     # readline returns '' at EOF
     for line in iter(process.stdout.readline, ''):
-        decoded = decodeString(line)
-        lines.append(decoded)
-        if verbose:
-            print(decoded, end='')
-        elif not silent:
-            count += 1
-            if count >= 80:
-                print()
-                count = 0
-            else:
-                print('.', end='')
+        if process.poll() is None:
+            decoded = decodeString(line)
+            lines.append(decoded)
+            if verbose:
+                print(decoded, end='')
+            elif not silent:
+                count += 1
+                if count >= 80:
+                    print()
+                    count = 0
+                else:
+                    print('.', end='')
+        else:
+            break
 
     if not verbose and count:
         print()