diff --git a/go.mod b/go.mod
index 639ab91..7afa0fe 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/codecrafters-io/grep-tester
 
 go 1.20
 
-require github.com/codecrafters-io/tester-utils v0.2.10
+require github.com/codecrafters-io/tester-utils v0.2.15
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
@@ -12,7 +12,7 @@ require (
 	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/stretchr/testify v1.8.4 // indirect
-	golang.org/x/sys v0.14.0 // indirect
+	golang.org/x/sys v0.18.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 4aca25b..b29734b 100644
--- a/go.sum
+++ b/go.sum
@@ -2,6 +2,8 @@ github.com/codecrafters-io/tester-utils v0.2.1 h1:+bdZLJhFMWcf+/E3C4NlGsIvxvsyBW
 github.com/codecrafters-io/tester-utils v0.2.1/go.mod h1:BeSLyqBpFxUwIm41QlnuRG7ZsabBXWE2Ga3LMFUXAPM=
 github.com/codecrafters-io/tester-utils v0.2.10 h1:Xpu6wzgpRpiZPFNGWMRcJXwAZZ0Yb5Mv6IDOR319f+s=
 github.com/codecrafters-io/tester-utils v0.2.10/go.mod h1:BeSLyqBpFxUwIm41QlnuRG7ZsabBXWE2Ga3LMFUXAPM=
+github.com/codecrafters-io/tester-utils v0.2.15 h1:d6lbr1nVkZ4+G55E47bG3bf1lWiMLOUZy5EiHwX2SsE=
+github.com/codecrafters-io/tester-utils v0.2.15/go.mod h1:BeSLyqBpFxUwIm41QlnuRG7ZsabBXWE2Ga3LMFUXAPM=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fatih/color v1.15.0 h1:kOqh6YHBtK8aywxGerMG2Eq3H6Qgoqeo13Bk2Mv/nBs=
@@ -27,6 +29,8 @@ golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
 golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
+golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
diff --git a/internal/stage_init.go b/internal/stage_init.go
index 99c2983..0a447dd 100644
--- a/internal/stage_init.go
+++ b/internal/stage_init.go
@@ -3,11 +3,11 @@ package internal
 import (
 	"fmt"
 
-	tester_utils "github.com/codecrafters-io/tester-utils"
+	"github.com/codecrafters-io/tester-utils/test_case_harness"
 )
 
 // Example from the grep course
-func testInit(stageHarness *tester_utils.StageHarness) error {
+func testInit(stageHarness *test_case_harness.TestCaseHarness) error {
 	// should exit with 0: echo "dog" | grep -E "d"
 	stageHarness.Logger.Infof("$ echo \"%s\" | ./script.sh -E \"%s\"", "dog", "d")
 
diff --git a/internal/tester_definition.go b/internal/tester_definition.go
index 864b452..b3f0527 100644
--- a/internal/tester_definition.go
+++ b/internal/tester_definition.go
@@ -1,16 +1,16 @@
 package internal
 
 import (
-	testerutils "github.com/codecrafters-io/tester-utils"
+	"github.com/codecrafters-io/tester-utils/tester_definition"
 )
 
-var testerDefinition = testerutils.TesterDefinition{
-	AntiCheatTestCases:    []testerutils.TestCase{},
+var testerDefinition = tester_definition.TesterDefinition{
+	AntiCheatTestCases: []tester_definition.TestCase{},
 	ExecutableFileName: "script.sh",
-	TestCases: []testerutils.TestCase{
+	TestCases: []tester_definition.TestCase{
 		{
-			Slug:                    "init",
-			TestFunc:                testInit,
+			Slug:     "init",
+			TestFunc: testInit,
 		},
 	},
 }