diff --git a/cmd/harmony/blsloader/loader_test.go b/cmd/harmony/blsloader/loader_test.go
new file mode 100644
index 000000000..6ce1e815d
--- /dev/null
+++ b/cmd/harmony/blsloader/loader_test.go
@@ -0,0 +1,53 @@
+package blsloader
+
+import (
+	"errors"
+	"reflect"
+	"testing"
+)
+
+func TestGetKeyDecrypters(t *testing.T) {
+	tests := []struct {
+		config   Config
+		expTypes []keyDecrypter
+		expErr   error
+	}{
+		{
+			config: Config{
+				PassSrcType:   PassSrcNil,
+				AwsCfgSrcType: AwsCfgSrcNil,
+			},
+			expErr: errors.New("must provide at least one bls key decryption"),
+		},
+		{
+			config: Config{
+				PassSrcType:   PassSrcFile,
+				AwsCfgSrcType: AwsCfgSrcShared,
+			},
+			expTypes: []keyDecrypter{
+				&passDecrypter{},
+				&kmsDecrypter{},
+			},
+		},
+	}
+	for i, test := range tests {
+		decrypters, err := getKeyDecrypters(test.config)
+		if assErr := assertError(err, test.expErr); assErr != nil {
+			t.Errorf("Test %v: %v", i, assErr)
+		}
+		if err != nil || test.expErr != nil {
+			continue
+		}
+		if len(decrypters) != len(test.expTypes) {
+			t.Errorf("Test %v: unexpected decrypter size: %v / %v", i, len(decrypters), len(test.expTypes))
+			continue
+		}
+		for ti := range decrypters {
+			gotType := reflect.TypeOf(decrypters[ti]).Elem()
+			expType := reflect.TypeOf(test.expTypes[ti]).Elem()
+			if gotType != expType {
+				t.Errorf("Test %v: %v decrypter type unexpected: %v / %v", i, ti, gotType, expType)
+			}
+		}
+	}
+}