diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bbadd63..7f459c5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,7 +6,7 @@ jobs:
     name: OTP ${{matrix.otp}}
     strategy:
       matrix:
-        otp: ['24', '25']
+        otp: ['24', '25', '26']
     steps:
       - uses: actions/checkout@v3
 
diff --git a/plugins/yanger_sn.erl b/plugins/yanger_sn.erl
index a01e0ab..614ba0a 100644
--- a/plugins/yanger_sn.erl
+++ b/plugins/yanger_sn.erl
@@ -193,6 +193,6 @@ s()  -> $\ .
 nl() -> $\n.
 
 indent(1) -> "  ";
-indent(2) -> "  ""  ";
-indent(3) -> "  ""  ""  ";
+indent(2) -> "  " "  ";
+indent(3) -> "  " "  " "  ";
 indent(Lvl) -> lists:duplicate(Lvl*2, s()).