diff --git a/benchmark/Dockerfile b/benchmark/Dockerfile
index 5cd765723..09e69f97d 100644
--- a/benchmark/Dockerfile
+++ b/benchmark/Dockerfile
@@ -1,19 +1,19 @@
 FROM buildpack-deps:jammy
 
-# Install Python 3.12
+# Install Python 3.11
 RUN apt-get update && apt-get install -y \
     software-properties-common \
     && add-apt-repository ppa:deadsnakes/ppa \
     && apt-get update \
     && apt-get install -y \
-    python3.12 \
-    python3.12-venv \
-    python3.12-dev \
+    python3.11 \
+    python3.11-venv \
+    python3.11-dev \
     python3-pip \
     && rm -rf /var/lib/apt/lists/*
 
-# Make python3.12 the default python3
-RUN update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.12 1
+# Make python3.11 the default python3
+RUN update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.11 1
 
 # Install Rust
 RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
diff --git a/benchmark/benchmark.py b/benchmark/benchmark.py
index a538f3152..2ba6f16dd 100755
--- a/benchmark/benchmark.py
+++ b/benchmark/benchmark.py
@@ -659,7 +659,14 @@ def run_test_real(
             # restore the original file, in case we interrupted a prev run
             # Find the original file in the language-specific practice dir
             lang_part = str(testdir).split("/exercises/practice/")[0]
-            original_fname = Path(lang_part) / "exercises" / "practice" / testdir.name / file_path
+            original_fname = (
+                original_dname
+                / Path(lang_part)
+                / "exercises"
+                / "practice"
+                / testdir.name
+                / file_path
+            )
             if original_fname.exists():
                 os.makedirs(src.parent, exist_ok=True)
                 shutil.copy(original_fname, src)