diff --git a/lldb/test/API/use_lldb_suite.py b/lldb/test/API/use_lldb_suite.py
--- a/lldb/test/API/use_lldb_suite.py
+++ b/lldb/test/API/use_lldb_suite.py
@@ -7,22 +7,25 @@
     lldb_root = os.path.dirname(
         os.path.abspath(inspect.getfile(inspect.currentframe()))
     )
+    # On Linux, dirname('/') == '/', so we keep looking in parent directories
+    # until the parent directory doesn't change.
+    prev_lldb_root = None
     while True:
+        prev_lldb_root = lldb_root
         lldb_root = os.path.dirname(lldb_root)
-        if lldb_root is None:
-            return None
+        if lldb_root is None or lldb_root == prev_lldb_root:
+            raise Exception("use_lldb_suite_root.py not found")
 
         test_path = os.path.join(lldb_root, "use_lldb_suite_root.py")
         if os.path.isfile(test_path):
             return lldb_root
-    return None
 
 lldb_root = find_lldb_root()
-if lldb_root is not None:
-    import imp
-    fp, pathname, desc = imp.find_module("use_lldb_suite_root", [lldb_root])
-    try:
-        imp.load_module("use_lldb_suite_root", fp, pathname, desc)
-    finally:
-        if fp:
-            fp.close()
+
+import imp
+fp, pathname, desc = imp.find_module("use_lldb_suite_root", [lldb_root])
+try:
+    imp.load_module("use_lldb_suite_root", fp, pathname, desc)
+finally:
+    if fp:
+        fp.close()