diff --git a/tests/periph_wdt/tests/01-run.py b/tests/periph_wdt/tests/01-run.py
index cc54a216af..e6020c9694 100755
--- a/tests/periph_wdt/tests/01-run.py
+++ b/tests/periph_wdt/tests/01-run.py
@@ -37,6 +37,7 @@ def get_reset_time(child):
 
 
 def testfunc(child):
+    child.expect_exact(">")
     child.sendline("range")
     child.expect(r"lower_bound: (\d+) upper_bound: (\d+)\s*\r\n",
                  timeout=1)
@@ -44,10 +45,12 @@ def testfunc(child):
     wdt_upper_bound = int(child.match.group(2))
 
     for rst_time in reset_times_ms:
+        child.expect_exact(">")
         child.sendline("setup 0 {}".format(rst_time))
         if rst_time < wdt_lower_bound or rst_time > wdt_upper_bound:
             child.expect_exact("invalid time, see \"range\"", timeout=1)
         else:
+            child.expect_exact(">")
             child.sendline("startloop")
             child.expect(r"start time: (\d+) us", timeout=1)
             start_time_us = int(child.match.group(1))