diff --git a/examples/git_tester.py b/examples/git_tester.py
index aaf70c82..be3b8a25 100644
--- a/examples/git_tester.py
+++ b/examples/git_tester.py
@@ -1,34 +1,40 @@
+import os
+import shutil
+
+from sys import platform
 from pydriller import Repository
-import os 
-import datetime
-os.system("cp examples/speedtest.py examples/speedtest2.py") # the file has to be outside of git
-for idx, commit in enumerate(Repository('.', from_tag="v0.6.0").traverse_commits()):    
-    name=commit.msg.replace('\n', ' ').replace('\r', ' ')
-    print(idx, commit.hash, name)
 
 
+speedtest_src_path = os.path.join("examples", "speedtest.py")
+speedtest_copy_path = os.path.join("examples", "speedtest2.py")
+shutil.copyfile(speedtest_src_path, speedtest_copy_path) # the file has to be outside of git
+
+commits = list(Repository('.', from_tag="v0.6.0").traverse_commits())
+print("Found commits:")
+for idx, commit in enumerate(commits):
+    name = commit.msg.replace('\n', ' ').replace('\r', ' ')
+    print(idx, commit.hash, name)
 
-for commit in Repository('.', from_tag="v0.6.0").traverse_commits():
-    
-    name=commit.msg.replace('\n', ' ').replace('\r', ' ')
-    print(commit.hash, name)
-    
-    os.system(f"git checkout {commit.hash}; rm -rf build; ")
+for commit in commits:
+    name = commit.msg.replace('\n', ' ').replace('\r', ' ')
+    print("\nProcessing", commit.hash, name)
+
+    if os.path.exists("build"):
+        shutil.rmtree("build")
+    os.system(f"git checkout {commit.hash}")
     print("\n\n--------------------\n\n")
-    ret=os.system("python -m pip install .")
-    print(ret)
-    
-    if ret != 0:
-        print ("build failed!!!!")
-        print ("build failed!!!!")
-        print ("build failed!!!!")
-        print ("build failed!!!!")
-        continue    
-    
-    os.system(f'python examples/speedtest2.py -n "{name}" -d 4 -t 1')
-    os.system(f'python examples/speedtest2.py -n "{name}" -d 64 -t 1')
-    os.system(f'python examples/speedtest2.py -n "{name}" -d 128 -t 1')
-    os.system(f'python examples/speedtest2.py -n "{name}" -d 4 -t 24')
-    os.system(f'python examples/speedtest2.py -n "{name}" -d 128 -t 24')
+    ret = os.system("python -m pip install .")
+    print("Install result:", ret)
 
+    if ret != 0:
+        print("build failed!!!!")
+        print("build failed!!!!")
+        print("build failed!!!!")
+        print("build failed!!!!")
+        continue
 
+    os.system(f'python {speedtest_copy_path} -n "{name}" -d 4 -t 1')
+    os.system(f'python {speedtest_copy_path} -n "{name}" -d 64 -t 1')
+    os.system(f'python {speedtest_copy_path} -n "{name}" -d 128 -t 1')
+    os.system(f'python {speedtest_copy_path} -n "{name}" -d 4 -t 24')
+    os.system(f'python {speedtest_copy_path} -n "{name}" -d 128 -t 24')
diff --git a/python_bindings/bindings.cpp b/python_bindings/bindings.cpp
index 3050d972..a72b5b21 100644
--- a/python_bindings/bindings.cpp
+++ b/python_bindings/bindings.cpp
@@ -155,7 +155,7 @@ class Index {
 
     void loadIndex(const std::string &path_to_index, size_t max_elements) {
       if (appr_alg) {
-          std::cerr<<"Warning: Calling load_index for an already inited index. Old index is being deallocated.";
+          std::cerr << "Warning: Calling load_index for an already inited index. Old index is being deallocated." << std::endl;
           delete appr_alg;
       }
       appr_alg = new hnswlib::HierarchicalNSW<dist_t>(l2space, path_to_index, false, max_elements);
@@ -768,7 +768,7 @@ class BFIndex {
 
     void loadIndex(const std::string &path_to_index, size_t max_elements) {
         if (alg) {
-            std::cerr<<"Warning: Calling load_index for an already inited index. Old index is being deallocated.";
+            std::cerr << "Warning: Calling load_index for an already inited index. Old index is being deallocated." << std::endl;
             delete alg;
         }
         alg = new hnswlib::BruteforceSearch<dist_t>(space, path_to_index);