diff --git a/internal/runner/act.go b/internal/runner/act.go
index dfa56b6..bed9f10 100644
--- a/internal/runner/act.go
+++ b/internal/runner/act.go
@@ -73,8 +73,8 @@ func actArgs(workflowDir string, environ []string) (args, extraEnv []string) {
args = []string{"--workflows", workflowDir}
for _, kv := range environ {
name, val, _ := strings.Cut(kv, "=")
- switch {
- case name == actPlatformsEnv:
+ switch name {
+ case actPlatformsEnv:
for _, p := range strings.Split(val, ",") {
if p = strings.TrimSpace(p); p != "" {
args = append(args, "-P", p)