diff --git a/pkg/agent/core_test.go b/pkg/agent/core_test.go
index 21b7ff2..8064819 100644
--- a/pkg/agent/core_test.go
+++ b/pkg/agent/core_test.go
@@ -85,6 +85,7 @@ func defaultBE() *mockBackend {
 // by directly setting preamble on AgentEnv.
 func newCore(t *testing.T, be backend.Backend, hooks Hooks) *agent {
 	t.Helper()
+	t.Setenv("OLLIE", "")
 	if be == nil {
 		be = defaultBE()
 	}
@@ -2108,6 +2109,7 @@ func (m *mockEnvServer) get(k string) string {
 
 func newCoreWithExecServer(t *testing.T, srv *mockEnvServer) *agent {
 	t.Helper()
+	t.Setenv("OLLIE", "")
 	d := tools.NewDispatcher()
 	d.AddServer("execute", srv)
 	env := AgentEnv{
diff --git a/pkg/tools/execute/execute_test.go b/pkg/tools/execute/execute_test.go
index 756e9ae..cb246bb 100644
--- a/pkg/tools/execute/execute_test.go
+++ b/pkg/tools/execute/execute_test.go
@@ -17,6 +17,7 @@ func TestMain(m *testing.M) {
 		panic(err)
 	}
 	os.Setenv("OLLIE_CFG_PATH", filepath.Join(wd, "testdata"))
+	os.Setenv("OLLIE", "")
 	os.Exit(m.Run())
 }