diff --git a/runtest.sh b/runtest.sh
index a3b9c45..44d83c9 100755
--- a/runtest.sh
+++ b/runtest.sh
@@ -198,7 +198,7 @@ for ((COUNTER = 1; COUNTER <= NUM_TESTS; COUNTER++)); do
       SECONDS=0
       log "Speed test attempt $retry"
       speed_results=$(speedtest --secure --csv 2>/dev/null || true)
-      $speedtest_duration=$SECONDS
+      speedtest_duration=$SECONDS
       [[ -n "$speed_results" ]] && break
       warn "Speedtest failed. Retrying in $RETRY_DELAY seconds..."
       echo "$(date -Iseconds),Speedtest failed on attempt $retry for test $COUNTER, sample $i" >> "$FAILURE_LOG"
@@ -209,7 +209,7 @@ for ((COUNTER = 1; COUNTER <= NUM_TESTS; COUNTER++)); do
       timestamp=$(date -Iseconds)
       warn "Speedtest permanently failed. Skipping sample."
       echo "$timestamp,Test $COUNTER,Sample $i" >>"$FAILURE_LOG"
-      $speedtest_duration=$SECONDS
+      speedtest_duration=$SECONDS
       continue
     fi