diff --git a/pkg/commands/git_test.go b/pkg/commands/git_test.go
index b2a20fe08..ab519e9ba 100644
--- a/pkg/commands/git_test.go
+++ b/pkg/commands/git_test.go
@@ -1396,7 +1396,7 @@ func TestGitCommandDiff(t *testing.T) {
 			"Default case",
 			func(cmd string, args ...string) *exec.Cmd {
 				assert.EqualValues(t, "git", cmd)
-				assert.EqualValues(t, []string{"diff", "--no-ext-diff", "--color=always", "--", "test.txt"}, args)
+				assert.EqualValues(t, []string{"diff", "--submodule", "--no-ext-diff", "--color=always", "--", "test.txt"}, args)
 
 				return exec.Command("echo")
 			},
@@ -1412,7 +1412,7 @@ func TestGitCommandDiff(t *testing.T) {
 			"cached",
 			func(cmd string, args ...string) *exec.Cmd {
 				assert.EqualValues(t, "git", cmd)
-				assert.EqualValues(t, []string{"diff", "--no-ext-diff", "--color=always", "--cached", "--", "test.txt"}, args)
+				assert.EqualValues(t, []string{"diff", "--submodule", "--no-ext-diff", "--color=always", "--cached", "--", "test.txt"}, args)
 
 				return exec.Command("echo")
 			},
@@ -1428,7 +1428,7 @@ func TestGitCommandDiff(t *testing.T) {
 			"plain",
 			func(cmd string, args ...string) *exec.Cmd {
 				assert.EqualValues(t, "git", cmd)
-				assert.EqualValues(t, []string{"diff", "--no-ext-diff", "--color=never", "--", "test.txt"}, args)
+				assert.EqualValues(t, []string{"diff", "--submodule", "--no-ext-diff", "--color=never", "--", "test.txt"}, args)
 
 				return exec.Command("echo")
 			},
@@ -1444,7 +1444,7 @@ func TestGitCommandDiff(t *testing.T) {
 			"File not tracked and file has no staged changes",
 			func(cmd string, args ...string) *exec.Cmd {
 				assert.EqualValues(t, "git", cmd)
-				assert.EqualValues(t, []string{"diff", "--no-ext-diff", "--color=always", "--no-index", "/dev/null", "test.txt"}, args)
+				assert.EqualValues(t, []string{"diff", "--submodule", "--no-ext-diff", "--color=always", "--no-index", "/dev/null", "test.txt"}, args)
 
 				return exec.Command("echo")
 			},