diff --git a/.travis.yml b/.travis.yml
index 8fdcc97..7f67b8b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ services:
   - docker
 
 script:
-  - go test -race -coverprofile=coverage.txt -covermode=atomic -coverpkg .
+  - go test -v -race -coverprofile=coverage.txt -covermode=atomic -coverpkg .
   - GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags "-X main.buildStamp=`date -u '+%Y-%m-%d_%I:%M:%S%p'` -X main.gitRevision=`git describe --tags || git rev-parse HEAD` -s -w"
   - gox -os "linux darwin windows" -arch "amd64" -osarch="windows/386" -output "dist/{{.Dir}}_{{.OS}}_{{.Arch}}" -ldflags "-X main.buildStamp=`date -u '+%Y-%m-%d_%I:%M:%S%p'` -X main.gitRevision=`git describe --tags || git rev-parse HEAD` -s -w"
 
diff --git a/main.go b/main.go
index 7b41f4d..41cc4bc 100644
--- a/main.go
+++ b/main.go
@@ -77,8 +77,8 @@ func showVersion() {
 }
 
 func fileExists(p string) bool {
-	_, err := os.Stat(p)
-	return !os.IsNotExist(err)
+	fileInfo, err := os.Stat(p)
+	return !os.IsNotExist(err) && !fileInfo.IsDir()
 }
 
 func init() {
@@ -98,7 +98,7 @@ func init() {
 	}
 	log.Printf("[-] [-] [INIT] [-] [-] [-] [-] [-] [-] [Users file is \"%s\"]\n", users)
 	if !fileExists(users) && !guestAccessAllowed {
-		log.Fatalf("[-] [-] [INIT] [-] [-] [-] [-] [-] [-] [Users file \"%s\" does not exist]\n", users)
+		log.Fatalf("[-] [-] [INIT] [-] [-] [-] [-] [-] [-] [Users file \"%s\" does not exist or is a directory]\n", users)
 	}
 	if err := loadQuotaFiles(quotaDir); err != nil {
 		log.Fatalf("[-] [-] [INIT] [-] [-] [-] [-] [-] [-] [%v]\n", err)
diff --git a/proxy_test.go b/proxy_test.go
index 4d55048..7fff8f4 100644
--- a/proxy_test.go
+++ b/proxy_test.go
@@ -22,6 +22,8 @@ import (
 	. "github.com/aandryashin/matchers"
 	. "github.com/aandryashin/matchers/httpresp"
 	"golang.org/x/net/websocket"
+	"os"
+	"path/filepath"
 )
 
 var (
@@ -1443,3 +1445,12 @@ func doHTTPRequestWithoutAuthentication(method string, url string, body io.Reade
 	client := &http.Client{}
 	return client.Do(req)
 }
+
+func TestFileExists(t *testing.T) {
+	tmpDir := os.TempDir()
+	AssertThat(t, fileExists(tmpDir), Is{false})
+	AssertThat(t, fileExists(filepath.Join(tmpDir, "missing-file")), Is{false})
+	f, err := ioutil.TempFile(tmpDir, "testfile")
+	AssertThat(t, err, Is{nil})
+	AssertThat(t, fileExists(f.Name()), Is{true})
+}
\ No newline at end of file