diff --git a/cov_tests/hash_tests.sh b/cov_tests/hash_tests.sh
index f1cacc7d..8dfa65ed 100755
--- a/cov_tests/hash_tests.sh
+++ b/cov_tests/hash_tests.sh
@@ -4,7 +4,11 @@ source kcov_blkar_fun.sh
 
 exit_code=0
 
-HASHES=("sha1" "sha256" "sha512" "blake2b-256" "blake2b-512")
+HASHES=("sha1" "sha256" "sha512")
+if [[ $(command -v b2sum) != "" ]]; then
+    HASHES[3]="blake2b-256"
+    HASHES[4]="blake2b-512"
+fi
 
 # Record the hashes
 a[0]=$(sha1sum   dummy | awk '{print $1}')