diff --git a/match_test.go b/match_test.go
index 2607c89..8605194 100644
--- a/match_test.go
+++ b/match_test.go
@@ -4,6 +4,7 @@ import "testing"
 
 func TestMatch(t *testing.T) {
 	t.Parallel()
+	initTests()
 
 	tests := []struct {
 		m      Matcher
diff --git a/predicate_test.go b/predicate_test.go
index d376d76..264e8d1 100644
--- a/predicate_test.go
+++ b/predicate_test.go
@@ -1,7 +1,6 @@
 package complete
 
 import (
-	"os"
 	"sort"
 	"strings"
 	"testing"
@@ -9,12 +8,7 @@ import (
 
 func TestPredicate(t *testing.T) {
 	t.Parallel()
-
-	// Change to tests directory for testing completion of files and directories
-	err := os.Chdir("./tests")
-	if err != nil {
-		t.Fatal(err)
-	}
+	initTests()
 
 	tests := []struct {
 		name string
diff --git a/run_test.go b/run_test.go
index 95b48b3..147a361 100644
--- a/run_test.go
+++ b/run_test.go
@@ -8,19 +8,7 @@ import (
 
 func TestCompleter_Complete(t *testing.T) {
 	t.Parallel()
-
-	// Set debug environment variable so logs will be printed
-	if testing.Verbose() {
-		os.Setenv(envDebug, "1")
-		// refresh the logger with environment variable set
-		Log = getLogger()
-	}
-
-	// Change to tests directory for testing completion of files and directories
-	err := os.Chdir("./tests")
-	if err != nil {
-		t.Fatal(err)
-	}
+	initTests()
 
 	c := Command{
 		Sub: map[string]Command{
diff --git a/tests.go b/tests.go
new file mode 100644
index 0000000..38fe5f1
--- /dev/null
+++ b/tests.go
@@ -0,0 +1,26 @@
+package complete
+
+import (
+	"os"
+	"sync"
+	"testing"
+)
+
+var once = sync.Once{}
+
+func initTests() {
+	once.Do(func() {
+		// Set debug environment variable so logs will be printed
+		if testing.Verbose() {
+			os.Setenv(envDebug, "1")
+			// refresh the logger with environment variable set
+			Log = getLogger()
+		}
+
+		// Change to tests directory for testing completion of files and directories
+		err := os.Chdir("./tests")
+		if err != nil {
+			panic(err)
+		}
+	})
+}