diff --git a/.gitignore b/.gitignore
index 15b499b..79f02e3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
 .terraform
 plan.tfplan
 terraform.tfstate.backup
+
+# IntelliJ IDE files
+.idea/
diff --git a/config_test.go b/config_test.go
index c0cf1e0..a8bbf93 100644
--- a/config_test.go
+++ b/config_test.go
@@ -6,11 +6,12 @@ package tfjson
 import (
 	"encoding/json"
 	"os"
+	"path/filepath"
 	"testing"
 )
 
 func TestConfigValidate(t *testing.T) {
-	f, err := os.Open("testdata/basic/plan.json")
+	f, err := os.Open(filepath.FromSlash("testdata/basic/plan.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/metadata_test.go b/metadata_test.go
index 9938a09..9b66b40 100644
--- a/metadata_test.go
+++ b/metadata_test.go
@@ -6,11 +6,12 @@ package tfjson
 import (
 	"encoding/json"
 	"os"
+	"path/filepath"
 	"testing"
 )
 
 func TestMetadataFunctionsValidate(t *testing.T) {
-	f, err := os.Open("testdata/basic/functions.json")
+	f, err := os.Open(filepath.FromSlash("testdata/basic/functions.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/plan_test.go b/plan_test.go
index 2f9b37c..e757109 100644
--- a/plan_test.go
+++ b/plan_test.go
@@ -6,6 +6,7 @@ package tfjson
 import (
 	"encoding/json"
 	"os"
+	"path/filepath"
 	"reflect"
 	"testing"
 
@@ -13,7 +14,7 @@ import (
 )
 
 func TestPlanValidate(t *testing.T) {
-	f, err := os.Open("testdata/basic/plan.json")
+	f, err := os.Open(filepath.FromSlash("testdata/basic/plan.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -30,7 +31,7 @@ func TestPlanValidate(t *testing.T) {
 }
 
 func TestPlan_015(t *testing.T) {
-	f, err := os.Open("testdata/basic/plan-0.15.json")
+	f, err := os.Open(filepath.FromSlash("testdata/basic/plan-0.15.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -68,7 +69,7 @@ func TestPlan_015(t *testing.T) {
 }
 
 func TestPlan_withChecks(t *testing.T) {
-	f, err := os.Open("testdata/has_checks/plan.json")
+	f, err := os.Open(filepath.FromSlash("testdata/has_checks/plan.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -101,7 +102,7 @@ func TestPlan_withChecks(t *testing.T) {
 }
 
 func TestPlan_movedBlock(t *testing.T) {
-	f, err := os.Open("testdata/moved_block/plan.json")
+	f, err := os.Open(filepath.FromSlash("testdata/moved_block/plan.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/schemas_test.go b/schemas_test.go
index 5044559..cf014a1 100644
--- a/schemas_test.go
+++ b/schemas_test.go
@@ -6,11 +6,12 @@ package tfjson
 import (
 	"encoding/json"
 	"os"
+	"path/filepath"
 	"testing"
 )
 
 func TestProviderSchemasValidate(t *testing.T) {
-	f, err := os.Open("testdata/basic/schemas.json")
+	f, err := os.Open(filepath.FromSlash("testdata/basic/schemas.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -27,7 +28,7 @@ func TestProviderSchemasValidate(t *testing.T) {
 }
 
 func TestProviderSchemasValidate_nestedAttributes(t *testing.T) {
-	f, err := os.Open("testdata/nested_attributes/schemas.json")
+	f, err := os.Open(filepath.FromSlash("testdata/nested_attributes/schemas.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/state_test.go b/state_test.go
index dee9021..c3bd4ee 100644
--- a/state_test.go
+++ b/state_test.go
@@ -7,11 +7,12 @@ import (
 	"encoding/json"
 	"io/ioutil"
 	"os"
+	"path/filepath"
 	"testing"
 )
 
 func TestStateValidate_raw(t *testing.T) {
-	f, err := os.Open("testdata/no_changes/state.json")
+	f, err := os.Open(filepath.FromSlash("testdata/no_changes/state.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -28,7 +29,7 @@ func TestStateValidate_raw(t *testing.T) {
 }
 
 func TestStateUnmarshal_valid(t *testing.T) {
-	f, err := os.Open("testdata/no_changes/state.json")
+	f, err := os.Open(filepath.FromSlash("testdata/no_changes/state.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -47,7 +48,7 @@ func TestStateUnmarshal_valid(t *testing.T) {
 }
 
 func TestStateUnmarshal_internalState(t *testing.T) {
-	f, err := os.Open("testdata/no_changes/terraform.tfstate")
+	f, err := os.Open(filepath.FromSlash("testdata/no_changes/terraform.tfstate"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -71,7 +72,7 @@ func TestStateUnmarshal_internalState(t *testing.T) {
 }
 
 func TestStateValidate_fromPlan(t *testing.T) {
-	f, err := os.Open("testdata/no_changes/plan.json")
+	f, err := os.Open(filepath.FromSlash("testdata/no_changes/plan.json"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -88,7 +89,7 @@ func TestStateValidate_fromPlan(t *testing.T) {
 }
 
 func TestStateValidate_fromPlan110(t *testing.T) {
-	f, err := os.Open("testdata/110_basic/plan.json")
+	f, err := os.Open(filepath.FromSlash("testdata/110_basic/plan.json"))
 	if err != nil {
 		t.Fatal(err)
 	}