diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 299cc443d..eede70e58 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -121,7 +121,7 @@ jobs:
             run: which python && python -m mypy --version && ./test.py mypy
 
           - name: Run go vet
-            run: cp kitty_tests/GraphemeBreakTest.json tools/wcswidth && go version && go vet ./...
+            run: go version && go vet -tags testing ./...
 
           - name: Build man page
             run: make FAIL_WARN=1 man
diff --git a/.gitignore b/.gitignore
index 8870a3434..b3609e1a0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,7 +23,6 @@ __pycache__/
 /docs/_build/
 /docs/generated/
 /tools/simdstring/simdstring.test
-/tools/wcswidth/GraphemeBreakTest.json
 /.mypy_cache
 /.ruff_cache
 .DS_Store
diff --git a/kitty_tests/main.py b/kitty_tests/main.py
index 2f10b2eb4..9fb569cb4 100644
--- a/kitty_tests/main.py
+++ b/kitty_tests/main.py
@@ -180,11 +180,10 @@ class GoProc(Thread):
 def run_go(packages: set[str], names: str) -> GoProc:
     go = go_exe()
     go_pkg_args = [f'kitty/{x}' for x in packages]
-    cmd = [go, 'test', '-v']
+    cmd = [go, 'test', '--tags', 'testing', '-v']
     for name in names:
         cmd.extend(('-run', name))
     cmd += go_pkg_args
-    shutil.copy2('kitty_tests/GraphemeBreakTest.json', 'tools/wcswidth/GraphemeBreakTest.json')
     return GoProc(cmd)
 
 
diff --git a/testing_exports.go b/testing_exports.go
new file mode 100644
index 000000000..b6741d086
--- /dev/null
+++ b/testing_exports.go
@@ -0,0 +1,13 @@
+//go:build testing
+
+package kitty
+
+import (
+	_ "embed"
+	"fmt"
+)
+
+var _ = fmt.Print
+
+//go:embed kitty_tests/GraphemeBreakTest.json
+var GraphemeBreakTestData []byte
diff --git a/tools/wcswidth/char-props_test.go b/tools/wcswidth/char-props_test.go
index 4e12980e6..bc3d3bbca 100644
--- a/tools/wcswidth/char-props_test.go
+++ b/tools/wcswidth/char-props_test.go
@@ -8,13 +8,12 @@ import (
 
 	_ "embed"
 	"github.com/google/go-cmp/cmp"
+
+	"kitty"
 )
 
 var _ = fmt.Print
 
-//go:embed GraphemeBreakTest.json
-var test_data []byte
-
 type GraphemeBreakTest struct {
 	Data    []string `json:"data"`
 	Comment string   `json:"comment"`
@@ -31,7 +30,7 @@ func TestSplitIntoGraphemes(t *testing.T) {
 		}
 	}
 	tests := []GraphemeBreakTest{}
-	if err := json.Unmarshal(test_data, &tests); err != nil {
+	if err := json.Unmarshal(kitty.GraphemeBreakTestData, &tests); err != nil {
 		t.Fatalf("Failed to parse GraphemeBreakTest JSON with error: %s", err)
 	}
 	for i, x := range tests {