diff --git a/test/rt/nosv/kernel-normal.driver.sh b/test/rt/nosv/kernel-normal.driver.sh
index 40a90ec..cb8b8d1 100644
--- a/test/rt/nosv/kernel-normal.driver.sh
+++ b/test/rt/nosv/kernel-normal.driver.sh
@@ -24,7 +24,7 @@ nflush=$(($ringsize / $cspair / 4))
 cat > nosv.toml << EOF
 instrumentation.version = "ovni"
 ovni.level = 3
-ovni.kernel_ringsize = ${ringsize}
+ovni.kernel_ringsize = "${ringsize}"
 EOF
 
 $target $ncs $nflush 2>&1 | tee err.log
diff --git a/test/rt/nosv/kernel-overflow.driver.sh b/test/rt/nosv/kernel-overflow.driver.sh
index 509d8d7..a4eeb7c 100644
--- a/test/rt/nosv/kernel-overflow.driver.sh
+++ b/test/rt/nosv/kernel-overflow.driver.sh
@@ -25,7 +25,7 @@ nflush=$((2 * $ringsize / $cspair))
 cat > nosv.toml << EOF
 instrumentation.version = "ovni"
 ovni.level = 3
-ovni.kernel_ringsize = ${ringsize}
+ovni.kernel_ringsize = "${ringsize}"
 EOF
 
 # Should fail in runtime