diff --git a/internal/backend/circuits/crumb.go b/internal/backend/circuits/crumb.go
new file mode 100644
index 0000000000..25c0f18f85
--- /dev/null
+++ b/internal/backend/circuits/crumb.go
@@ -0,0 +1,31 @@
+package circuits
+
+import (
+	"github.com/consensys/gnark/frontend"
+	"golang.org/x/exp/rand"
+)
+
+type isCrumbCircuit struct {
+	C []frontend.Variable
+}
+
+func (circuit *isCrumbCircuit) Define(api frontend.API) error {
+	for _, x := range circuit.C {
+		api.AssertIsCrumb(x)
+	}
+	return nil
+}
+
+func init() {
+	c := []frontend.Variable{0, 1, 2, 3}
+	good := []frontend.Circuit{
+		&isCrumbCircuit{C: c},
+	}
+	addNewEntry("isCrumb/case=good", &isCrumbCircuit{C: make([]frontend.Variable, len(c))}, good, nil, nil)
+	var bad []frontend.Circuit
+	for n := 0; n < 20; n++ {
+		x := rand.Intn(65531) + 4 //#nosec G404 weak rng OK for test
+		bad = append(bad, &isCrumbCircuit{C: []frontend.Variable{x}})
+	}
+	addNewEntry("isCrumb/case=bad", &isCrumbCircuit{C: []frontend.Variable{nil}}, nil, bad, nil)
+}
diff --git a/test/api_assertions_test.go b/test/api_assertions_test.go
deleted file mode 100644
index f53e2e2f25..0000000000
--- a/test/api_assertions_test.go
+++ /dev/null
@@ -1,28 +0,0 @@
-package test
-
-import (
-	"github.com/consensys/gnark/frontend"
-	"math/rand"
-	"testing"
-)
-
-func TestIsCrumb(t *testing.T) {
-	c := []frontend.Variable{0, 1, 2, 3}
-	assert := NewAssert(t)
-	assert.SolvingSucceeded(&isCrumbCircuit{C: make([]frontend.Variable, len(c))}, &isCrumbCircuit{C: c})
-	for n := 0; n < 20; n++ {
-		x := rand.Intn(65531) + 4 //#nosec G404 weak rng OK for test
-		assert.SolvingFailed(&isCrumbCircuit{C: []frontend.Variable{nil}}, &isCrumbCircuit{C: []frontend.Variable{x}})
-	}
-}
-
-type isCrumbCircuit struct {
-	C []frontend.Variable
-}
-
-func (circuit *isCrumbCircuit) Define(api frontend.API) error {
-	for _, x := range circuit.C {
-		api.AssertIsCrumb(x)
-	}
-	return nil
-}
diff --git a/test/quick.go b/test/quick.go
new file mode 100644
index 0000000000..457245404f
--- /dev/null
+++ b/test/quick.go
@@ -0,0 +1,50 @@
+package test
+
+import (
+	"crypto/rand"
+	"encoding/binary"
+	"errors"
+	"github.com/consensys/gnark/frontend"
+	"github.com/stretchr/testify/require"
+	"sync"
+	"testing"
+)
+
+var snarkFunctionStore sync.Map
+
+type snarkFunctionTestCircuit struct {
+	funcId     uint64            // this workaround is necessary because deepEquals fails on objects with function fields
+	DummyInput frontend.Variable // to keep the Plonk backend from crashing
+}
+
+func (c *snarkFunctionTestCircuit) Define(api frontend.API) error {
+
+	f, ok := snarkFunctionStore.Load(c.funcId)
+	if !ok {
+		return errors.New("function not found")
+	}
+
+	F, ok := f.(func(frontend.API) error)
+	if !ok {
+		panic("unexpected entry type")
+	}
+
+	return F(api)
+}
+
+// Function returns a test function that can run a simple circuit consisting of function f
+func Function(f func(frontend.API) error, opts ...TestingOption) func(*testing.T) {
+	return func(t *testing.T) {
+		var (
+			c snarkFunctionTestCircuit
+			b [8]byte
+		)
+		_, err := rand.Read(b[:])
+		require.NoError(t, err)
+		c.funcId = binary.BigEndian.Uint64(b[:])
+		snarkFunctionStore.Store(c.funcId, f)
+
+		NewAssert(t).SolvingSucceeded(&c, &snarkFunctionTestCircuit{DummyInput: 0}, opts...)
+		snarkFunctionStore.Delete(c.funcId)
+	}
+}