diff --git a/bin/src/named.rs b/bin/src/named.rs
index fd8ae98c..7d11e5c4 100644
--- a/bin/src/named.rs
+++ b/bin/src/named.rs
@@ -366,7 +366,7 @@ fn main() {
     let mut runtime = runtime::Builder::new()
         .enable_all()
         .threaded_scheduler()
-        .num_threads(4)
+        .core_threads(4)
         .thread_name("trust-dns-server-runtime")
         .build()
         .expect("failed to initialize Tokio Runtime");
diff --git a/scripts/kcov.sh b/scripts/kcov.sh
index de9f9232..ed80de8f 100755
--- a/scripts/kcov.sh
+++ b/scripts/kcov.sh
@@ -13,4 +13,7 @@ COVERAGE_OUTPUT_DIR=${KCOV_TARGET_DIRECTORY:?}/$(basename ${1:?})
 mkdir -p ${COVERAGE_OUTPUT_DIR:?}
 
 # run kcov
-exec ${KCOV:?} --include-pattern=${KCOV_INCLUDE_PATTERN:?} ${KCOV_EXCLUDE_LINE_ARG} ${KCOV_EXCLUDE_REGION_ARG} ${COVERAGE_OUTPUT_DIR:?} $@
\ No newline at end of file
+KCOV_CALL="${KCOV:?} --include-pattern=${KCOV_INCLUDE_PATTERN:?} ${KCOV_EXCLUDE_LINE_ARG} ${KCOV_EXCLUDE_REGION_ARG} ${COVERAGE_OUTPUT_DIR:?} $@"
+
+echo ${KCOV_CALL:?}
+exec ${KCOV_CALL:?}
\ No newline at end of file