diff --git a/course/page/code_runpy_backend.py b/course/page/code_runpy_backend.py
index 16cdf00fb04cf1ea00a99c42774d7e06eb9d6191..4fc7bed139760fcd66a6ded0034400d9fdc0d30f 100644
--- a/course/page/code_runpy_backend.py
+++ b/course/page/code_runpy_backend.py
@@ -24,6 +24,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 """
 
+import math
 import sys
 import traceback
 
@@ -300,6 +301,9 @@ def run_code(result, run_req):
             package_exception(result, "test_error")
             return
 
+    if feedback.points is not None and math.isclose(feedback.points, 1):
+        feedback.points = 1
+
     if not (feedback.points is None or 0 <= feedback.points <= 1):
         raise ValueError("grade point value is invalid: %s"
                 % feedback.points)