diff --git a/.gitignore b/.gitignore
index 692608ca..f24cfd94 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,4 +10,4 @@ __pycache__
 /perf.data*
 /.gdb_history
 .features.txt
-scripts/aby_tests/tests/*
+scripts/aby_tests/tests
diff --git a/driver.py b/driver.py
index d5bff383..206c0776 100755
--- a/driver.py
+++ b/driver.py
@@ -38,7 +38,7 @@ def check(features):
     cargo_features = filter_cargo_features(features)
     if cargo_features:        
        cmd = cmd + ["--features"] + cargo_features
-    subprocess.run(cmd)
+    subprocess.run(cmd, check=True)
 
 def build(features):
     """
@@ -65,14 +65,14 @@ def build(features):
     cargo_features = filter_cargo_features(features)
     if cargo_features:
         cmd = cmd + ["--features"] + cargo_features
-    subprocess.run(cmd)
+    subprocess.run(cmd, check=True)
 
     if "aby" in features:
         if "c" in features:
-            subprocess.run(["./scripts/build_mpc_c_test.zsh"])
+            subprocess.run(["./scripts/build_mpc_c_test.zsh"], check=True)
         if "smt" in features and "zok" in features:
-            subprocess.run(["./scripts/build_mpc_zokrates_test.zsh"])
-        subprocess.run(["./scripts/build_aby.zsh"])
+            subprocess.run(["./scripts/build_mpc_zokrates_test.zsh"], check=True)
+        subprocess.run(["./scripts/build_aby.zsh"], check=True)
 
 def test(features):
     """
diff --git a/scripts/clean_aby.zsh b/scripts/clean_aby.zsh
index f7638304..a18486f7 100755
--- a/scripts/clean_aby.zsh
+++ b/scripts/clean_aby.zsh
@@ -1,3 +1,3 @@
 #!/usr/bin/env zsh
 
-rm -rf ./scripts/aby_tests/tests/*
+rm -rf ./scripts/aby_tests/tests
diff --git a/src/target/aby/utils.rs b/src/target/aby/utils.rs
index 7e790043..3f126e3c 100644
--- a/src/target/aby/utils.rs
+++ b/src/target/aby/utils.rs
@@ -23,6 +23,11 @@ pub fn get_path(path: &Path, lang: &str, t: &str) -> String {
         .into_string()
         .unwrap();
 
+    match fs::create_dir_all("scripts/aby_tests/tests") {
+        Err(why) => panic!("couldn't create {}: {}", "scripts/aby_tests/tests", why),
+        Ok(file) => file,
+    };
+
     let name = format!("{}_{}", filename, lang);
     let path = format!("scripts/aby_tests/tests/{}_{}.txt", name, t);
     match fs::File::create(&path) {