diff --git a/common/common.cpp b/common/common.cpp
index d48aafe91..303d3ded5 100644
--- a/common/common.cpp
+++ b/common/common.cpp
@@ -1843,7 +1843,7 @@ std::vector<llama_arg> gpt_params_parser_init(gpt_params & params, llama_example
         [](gpt_params & params, const std::string & value) {
             params.model_alias = value;
         }
-    ).set_examples({LLAMA_EXAMPLE_SERVER}).set_env("LLAMA_ARG_MODEL"));
+    ).set_examples({LLAMA_EXAMPLE_SERVER}));
     add_opt(llama_arg(
         {"-m", "--model"}, "FNAME",
         ex == LLAMA_EXAMPLE_EXPORT_LORA
diff --git a/tests/test-arg-parser.cpp b/tests/test-arg-parser.cpp
index 714a98d66..9ad91acc0 100644
--- a/tests/test-arg-parser.cpp
+++ b/tests/test-arg-parser.cpp
@@ -16,7 +16,9 @@ int main(void) {
         try {
             auto options = gpt_params_parser_init(params, (enum llama_example)ex);
             std::unordered_set<std::string> seen_args;
+            std::unordered_set<std::string> seen_env_vars;
             for (const auto & opt : options) {
+                // check for args duplications
                 for (const auto & arg : opt.args) {
                     if (seen_args.find(arg) == seen_args.end()) {
                         seen_args.insert(arg);
@@ -25,6 +27,15 @@ int main(void) {
                         exit(1);
                     }
                 }
+                // check for env var duplications
+                if (opt.env) {
+                    if (seen_env_vars.find(opt.env) == seen_env_vars.end()) {
+                        seen_env_vars.insert(opt.env);
+                    } else {
+                        fprintf(stderr, "test-arg-parser: found different handlers for the same env var: %s", opt.env);
+                        exit(1);
+                    }
+                }
             }
         } catch (std::exception & e) {
             printf("%s\n", e.what());