diff --git a/run-tests.sh b/run-tests.sh
index f9cdaa72..9aaafb2e 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -75,6 +75,25 @@ shell_version() {
   esac
 }
 
+get_time_millis_macos=
+get_time_millis() {
+  # To accurately measure time, we want to exclude the time it takes to detect
+  # the platform so we do it once and cache the result
+  if [ -z $get_time_millis_macos ]; then
+    get_time_millis_macos=0
+    if uname | grep -q "Darwin"; then
+      get_time_millis_macos=1
+    fi
+  fi
+
+  # On MacOS, the date utility doesn't recognize the %N format string
+  if [ $get_time_millis_macos = 1 ]; then
+    gdate +%s%3N
+  else
+    date +%s%3N
+  fi
+}
+
 # Some tests specify command line arguments in the source file
 # This function extracts the arguments from the source file
 # To specify arguments, add a comment in the source file like this:
@@ -143,8 +162,10 @@ run_test() { # file_to_test: $1
     "$pnut_comp" "$file" > "$dir/$filename.$ext" 2> "$dir/$filename.err"
     if [ $? -eq 0 ]; then
       chmod +x "$dir/$filename.$ext"
+      t0=$(get_time_millis)
       execute_test "$dir/$filename.$ext" "$(test_timeout $file)" "$(test_args $file)" > "$golden_file"
-      echo "🟡 Golden file generated by pnut"
+      t1=$(get_time_millis)
+      echo "🟡 Golden file generated by pnut [$(($t1 - $t0))ms]"
     else
       echo "❌ Failed to compile with pnut"
     fi
@@ -156,26 +177,28 @@ run_test() { # file_to_test: $1
 
   if [ $? -eq 0 ]; then # If compilation was successful
     chmod +x "$dir/$filename.$ext"
+    t0=$(get_time_millis)
     execute_test "$dir/$filename.$ext" "$(test_timeout $file)" "$(test_args $file)" > "$dir/$filename.output" 2> "$dir/$filename.err"
+    t1=$(get_time_millis)
     if [ $? -eq 0 ]; then # If the executable ran successfully
       diff_out=$(diff "$dir/$filename.output" "$dir/$filename.golden")
       if [ $? -eq 0 ]; then # If the output matches the golden file
-        echo "✅ Test passed"
+        echo "✅ Test passed [$(($t1 - $t0))ms]"
         return 0
       elif test_expect_failure_for_shell "$file"; then
-        echo "⚠️ Test disabled for $shell"
+        echo "⚠️ Test disabled for $shell [$(($t1 - $t0))ms]"
         return 0
       else
-        echo "❌ Test failed"
+        echo "❌ Test failed [$(($t1 - $t0))ms]"
         echo "diff (output vs expected)"
         echo "$diff_out"
         return 1
       fi
     elif test_expect_failure_for_shell "$file"; then
-      echo "⚠️ Test disabled for $shell"
+      echo "⚠️ Test disabled for $shell [$(($t1 - $t0))ms]"
       return 0
     else
-      echo "❌ Failed to run: $(cat "$dir/$filename.err")"
+      echo "❌ Failed to run: $(cat "$dir/$filename.err") [$(($t1 - $t0))ms]"
       return 1
     fi
   else