diff --git a/tests/dtc-checkfails.sh b/tests/dtc-checkfails.sh
index 87992a0..3f77b13 100755
--- a/tests/dtc-checkfails.sh
+++ b/tests/dtc-checkfails.sh
@@ -17,10 +17,7 @@
 verbose_run_log "$LOG" $VALGRIND "$DTC" -o /dev/null "$@"
 ret="$?"
 
-if [ "$ret" -gt 127 ]; then
-    signame=$(kill -l $[ret - 128])
-    FAIL "Killed by SIG$signame"
-fi
+FAIL_IF_SIGNAL $ret
 
 for c in $CHECKS; do
     if ! grep -E "^(ERROR)|(Warning) \($c\):" $LOG > /dev/null; then
diff --git a/tests/fdtget-runtest.sh b/tests/fdtget-runtest.sh
index 44c3529..42dc00c 100755
--- a/tests/fdtget-runtest.sh
+++ b/tests/fdtget-runtest.sh
@@ -18,10 +18,7 @@
 	PASS
 fi
 
-if [ "$ret" -gt 127 ]; then
-    signame=$(kill -l $[ret - 128])
-    FAIL "Killed by SIG$signame"
-fi
+FAIL_IF_SIGNAL $ret
 
 diff $EXPECT $LOG
 ret="$?"
diff --git a/tests/fdtput-runtest.sh b/tests/fdtput-runtest.sh
index c4b2135..9178d2f 100644
--- a/tests/fdtput-runtest.sh
+++ b/tests/fdtput-runtest.sh
@@ -29,19 +29,14 @@
 if [ "$ret" -ne 0 -a "$expect" = "ERR" ]; then
 	PASS
 fi
-if [ "$ret" -gt 127 ]; then
-    signame=$(kill -l $[ret - 128])
-    FAIL "Killed by SIG$signame"
-fi
+
+FAIL_IF_SIGNAL $ret
 
 # Now fdtget to read the value
 verbose_run_log "$LOG" $VALGRIND "$DTGET" "$dtb" "$node" "$property" $flags
 ret="$?"
 
-if [ "$ret" -gt 127 ]; then
-    signame=$(kill -l $[ret - 128])
-    FAIL "Killed by SIG$signame"
-fi
+FAIL_IF_SIGNAL $ret
 
 diff $EXPECT $LOG
 ret="$?"
diff --git a/tests/tests.sh b/tests/tests.sh
index 6e5e76a..3b7c6c8 100644
--- a/tests/tests.sh
+++ b/tests/tests.sh
@@ -10,6 +10,14 @@
     exit 2
 }
 
+FAIL_IF_SIGNAL () {
+    ret="$1"
+    if [ "$ret" -gt 127 ]; then
+	signame=$(kill -l $((ret - 128)))
+	FAIL "Killed by SIG$signame"
+    fi
+}
+
 DTC=../dtc
 DTGET=../fdtget
 DTPUT=../fdtput