diff --git a/dotenv/tests/test-variable-substitution.rs b/dotenv/tests/test-variable-substitution.rs
index 87a37ed0..6bde0f5c 100644
--- a/dotenv/tests/test-variable-substitution.rs
+++ b/dotenv/tests/test-variable-substitution.rs
@@ -25,6 +25,8 @@ SUBSTITUTION_WITHOUT_QUOTES={}
         common_string, common_string, common_string
     ))?;
 
+    dotenvy::dotenv()?;
+
     assert_eq!(env::var("KEY")?, "value");
     assert_eq!(env::var("KEY1")?, "value1");
     assert_eq!(env::var("KEY_U")?, "value+valueU");
diff --git a/dotenv/tests/test-vars.rs b/dotenv/tests/test-vars.rs
index 1dea4214..4f513344 100644
--- a/dotenv/tests/test-vars.rs
+++ b/dotenv/tests/test-vars.rs
@@ -7,7 +7,7 @@ use std::{collections::HashMap, env, error};
 fn test_vars() -> Result<(), Box<dyn error::Error>> {
     let dir = make_test_dotenv()?;
 
-    let vars: HashMap<String, String> = env::vars().collect();
+    let vars: HashMap<String, String> = dotenvy::vars().collect();
 
     assert_eq!(vars["TESTKEY"], "test_val");