diff --git a/regression/run_fwbw.sh b/regression/run_fwbw.sh
new file mode 100644
index 0000000..4f2f610
--- /dev/null
+++ b/regression/run_fwbw.sh
@@ -0,0 +1,34 @@
+#!/bin/sh -e
+fake_pref() {
+    QDB="$1"
+    TDB="$2"
+    RES="$3"
+    # create link to data file which contains a list of all targets that should be aligned
+    ln -s "${TDB}.index" "${RES}"
+    # create new index repeatedly pointing to same entry
+    INDEX_SIZE="$(echo $(wc -c < "${TDB}.index"))"
+    awk -v size=$INDEX_SIZE '{ print $1"\t0\t"size; }' "${QDB}.index" > "${RES}.index"
+    # create dbtype (7)
+    awk 'BEGIN { printf("%c%c%c%c",7,0,0,0); exit; }' > "${RES}.dbtype"
+}
+
+mkdir -p "${RESULTS}/fwbw" #makes sure index files do not get mixed 
+
+QUERY="${DATADIR}/query.fasta"
+QUERYDB="${RESULTS}/fwbw/query_fwbw"
+"${MMSEQS}" createdb "${QUERY}" "${QUERYDB}"
+
+TARGET="${DATADIR}/targetannotation.fasta"
+TARGETDB="${RESULTS}/fwbw/targetannotation_fwbw"
+"${MMSEQS}" createdb "${TARGET}" "${TARGETDB}"
+
+"${MMSEQS}" prefilter "$QUERYDB" "${TARGETDB}" "$RESULTS/fwbw/pref"
+awk 'BEGIN { printf("%c%c%c%c",5,0,0,0); exit; }' > "$RESULTS/fwbw/pref.dbtype"
+"${MMSEQS}" fwbw "$QUERYDB" "$TARGETDB" "$RESULTS/fwbw/pref" "$RESULTS/fwbw/results_fwbw" -e 10000
+"${MMSEQS}" convertalis "$QUERYDB" "$TARGETDB" "$RESULTS/fwbw/results_fwbw" "$RESULTS/fwbw/results_fwbw.m8"
+"${EVALUATE}" "$QUERY" "$TARGET" "$RESULTS/fwbw/results_fwbw.m8" "${RESULTS}/fwbw/evaluation_roc5.dat" 4000 1 | tee "${RESULTS}/fwbw/evaluation.log"
+ACTUAL=$(grep "^ROC5 AUC:" "${RESULTS}/fwbw/evaluation.log" | cut -d" " -f3)
+TARGET="0.207452"
+awk -v actual="$ACTUAL" -v target="$TARGET" \
+    'BEGIN { print (actual == target) ? "GOOD" : "BAD"; print "Expected: ", target; print "Actual: ", actual; }' \
+    > "${RESULTS}.report"
diff --git a/run_regression.sh b/run_regression.sh
index eadc524..fbc266b 100755
--- a/run_regression.sh
+++ b/run_regression.sh
@@ -95,6 +95,7 @@ run_test LINCLUST_UPDATE "run_cluster_update.sh"
 run_test EASYNUCLNUCLTAX_SEARCH "run_easy_nuclnucltax.sh"
 run_test EXTRACTORFS "run_extractorfs.sh"
 run_test RBH "run_rbh.sh"
+run_test FWBW "run_fwbw.sh"
 case "$(uname -s)" in
     CYGWIN*|MINGW32*|MSYS*|MINGW*)
         ;;