diff --git a/tools/testtool/testdata/submissions/correct/coverme/private/coverme/coverage_test.go b/tools/testtool/testdata/submissions/correct/coverme/private/coverme/coverage_test.go
index 0b1f59f..6aebc0d 100644
--- a/tools/testtool/testdata/submissions/correct/coverme/private/coverme/coverage_test.go
+++ b/tools/testtool/testdata/submissions/correct/coverme/private/coverme/coverage_test.go
@@ -6,10 +6,11 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/require"
+
 	"gitlab.com/slon/shad-go/coverme"
 )
 
-// min coverage: 60%
+// min coverage: 70%
 
 func TestSum(t *testing.T) {
 	require.Equal(t, int64(2), coverme.Sum(1, 1))
diff --git a/tools/testtool/testdata/submissions/correct/coverme/private/coverme/service.go b/tools/testtool/testdata/submissions/correct/coverme/private/coverme/service.go
index d350073..48e8e89 100644
--- a/tools/testtool/testdata/submissions/correct/coverme/private/coverme/service.go
+++ b/tools/testtool/testdata/submissions/correct/coverme/private/coverme/service.go
@@ -2,9 +2,13 @@
 
 package coverme
 
+import "net/http"
+
 func Sum(a, b int64) int64 {
 	if a == 0 {
 		return b
+	} else if a == http.StatusOK {
+		return http.StatusCreated + b - 1
 	}
 	return a + b
 }
diff --git a/tools/testtool/testdata/submissions/correct/coverme/private/coverme/solution_test.go b/tools/testtool/testdata/submissions/correct/coverme/private/coverme/solution_test.go
index 6d72392..059a2b5 100644
--- a/tools/testtool/testdata/submissions/correct/coverme/private/coverme/solution_test.go
+++ b/tools/testtool/testdata/submissions/correct/coverme/private/coverme/solution_test.go
@@ -11,4 +11,5 @@ import (
 func TestSum(t *testing.T) {
 	require.Equal(t, int64(2), Sum(1, 1))
 	require.Equal(t, int64(1), Sum(0, 1))
+	require.Equal(t, int64(202), Sum(200, 2))
 }
diff --git a/tools/testtool/testdata/submissions/correct/coverme/private/coverme/subpkg/g.go b/tools/testtool/testdata/submissions/correct/coverme/private/coverme/subpkg/g.go
new file mode 100644
index 0000000..acbff5b
--- /dev/null
+++ b/tools/testtool/testdata/submissions/correct/coverme/private/coverme/subpkg/g.go
@@ -0,0 +1,5 @@
+package subpkg
+
+func AddTwo(n int) int {
+	return AddOne(n + 1)
+}
diff --git a/tools/testtool/testdata/submissions/correct/coverme/student/coverme/additional_test.go b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/additional_test.go
new file mode 100644
index 0000000..95dc7a3
--- /dev/null
+++ b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/additional_test.go
@@ -0,0 +1,11 @@
+package coverme
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestSum2(t *testing.T) {
+	require.Equal(t, int64(202), Sum(200, 2))
+}
diff --git a/tools/testtool/testdata/submissions/correct/coverme/student/coverme/coverage_test.go b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/coverage_test.go
index 0b1f59f..6aebc0d 100644
--- a/tools/testtool/testdata/submissions/correct/coverme/student/coverme/coverage_test.go
+++ b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/coverage_test.go
@@ -6,10 +6,11 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/require"
+
 	"gitlab.com/slon/shad-go/coverme"
 )
 
-// min coverage: 60%
+// min coverage: 70%
 
 func TestSum(t *testing.T) {
 	require.Equal(t, int64(2), coverme.Sum(1, 1))
diff --git a/tools/testtool/testdata/submissions/correct/coverme/student/coverme/service.go b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/service.go
index d350073..48e8e89 100644
--- a/tools/testtool/testdata/submissions/correct/coverme/student/coverme/service.go
+++ b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/service.go
@@ -2,9 +2,13 @@
 
 package coverme
 
+import "net/http"
+
 func Sum(a, b int64) int64 {
 	if a == 0 {
 		return b
+	} else if a == http.StatusOK {
+		return http.StatusCreated + b - 1
 	}
 	return a + b
 }
diff --git a/tools/testtool/testdata/submissions/correct/coverme/student/coverme/subpkg/additional_test.go b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/subpkg/additional_test.go
index b624221..366a2dd 100644
--- a/tools/testtool/testdata/submissions/correct/coverme/student/coverme/subpkg/additional_test.go
+++ b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/subpkg/additional_test.go
@@ -10,3 +10,7 @@ func TestAddOne_2(t *testing.T) {
 	require.Equal(t, 2, AddOne(1))
 	require.Equal(t, 30, AddOne(29))
 }
+
+func TestAddTwo(t *testing.T) {
+	require.Equal(t, 4, AddTwo(2))
+}
diff --git a/tools/testtool/testdata/submissions/correct/coverme/student/coverme/subpkg/g.go b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/subpkg/g.go
new file mode 100644
index 0000000..acbff5b
--- /dev/null
+++ b/tools/testtool/testdata/submissions/correct/coverme/student/coverme/subpkg/g.go
@@ -0,0 +1,5 @@
+package subpkg
+
+func AddTwo(n int) int {
+	return AddOne(n + 1)
+}
diff --git a/tools/testtool/testdata/submissions/correct/coverme/student/go.sum b/tools/testtool/testdata/submissions/correct/coverme/student/go.sum
index fb52f53..a80206a 100644
--- a/tools/testtool/testdata/submissions/correct/coverme/student/go.sum
+++ b/tools/testtool/testdata/submissions/correct/coverme/student/go.sum
@@ -1,6 +1,10 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=