diff --git a/parser/test-common.go b/parser/test-common.go
index fe5d9cd..b011015 100644
--- a/parser/test-common.go
+++ b/parser/test-common.go
@@ -1,30 +1,24 @@
 package parser
 
 import "io"
-import "fmt"
 import "testing"
 import "strings"
+import "git.tebibyte.media/sashakoshka/fspl/testcommon"
 
-func testString (test *testing.T, correct, input string) {
-	testReader(test, correct, strings.NewReader(input))
-}
-
-func testReader (test *testing.T, correct string, inputs ...io.Reader) {
-	tree := Tree { }
-	for index, stream := range inputs {
-		err := tree.Parse(fmt.Sprintf("stream%d.fspl", index), stream)
-		if err != nil {
-			test.Error("parser returned error: ", err)
-			return
-		}
-	}
-
-	got := tree.String()
-	if got != correct {
-		test.Log("strings do not match")
-		test.Log("tree.String():\n" + got)
-		test.Log("correct:\n" + correct)
-		test.Fail()
+func testString (test *testing.T, correct string, input string) {
+	ast := Tree { }
+	err := ast.Parse("input.fspl", strings.NewReader(input))
+	if err != nil && err != io.EOF{
+		test.Error("parser returned error:", err)
 		return
 	}
+
+	got := ast.String()
+	if got != correct {
+		test.Logf("results do not match")
+		testcommon.Compare(test, correct, got)
+		test.Log("SOURCE FSPL CODE:")
+		test.Log("\033[32m" + input + "\033[0m")
+		test.Fail()
+	}
 }