diff --git a/tests/e2e/auction/cli_test.go b/tests/e2e/auction/cli_test.go
index 6fe03c4d..2ba78f32 100644
--- a/tests/e2e/auction/cli_test.go
+++ b/tests/e2e/auction/cli_test.go
@@ -11,6 +11,7 @@ import (
 
 func TestE2ETestSuite(t *testing.T) {
 	cfg := network.DefaultConfig(e2e.NewTestNetworkFixture)
-	cfg.NumValidators = 2
+	cfg.NumValidators = 1
+
 	suite.Run(t, NewE2ETestSuite(cfg))
 }
diff --git a/tests/e2e/auction/grpc.go b/tests/e2e/auction/grpc.go
new file mode 100644
index 00000000..332bc103
--- /dev/null
+++ b/tests/e2e/auction/grpc.go
@@ -0,0 +1,26 @@
+package auction
+
+import (
+	"fmt"
+
+	"github.com/cosmos/cosmos-sdk/testutil"
+
+	auctiontypes "git.vdb.to/cerc-io/laconic2d/x/auction"
+)
+
+func (ets *E2ETestSuite) TestQueryParamsGrpc() {
+	val := ets.network.Validators[0]
+	sr := ets.Require()
+	reqURL := fmt.Sprintf("%s/cerc/auction/v1/params", val.APIAddress)
+
+	ets.Run("valid request to get auction params", func() {
+		resp, err := testutil.GetRequest(reqURL)
+		ets.Require().NoError(err)
+
+		var params auctiontypes.QueryParamsResponse
+		err = val.ClientCtx.Codec.UnmarshalJSON(resp, &params)
+
+		sr.NoError(err)
+		sr.Equal(*params.GetParams(), auctiontypes.DefaultParams())
+	})
+}
diff --git a/tests/e2e/common.go b/tests/e2e/common.go
index 5d446527..12adbffc 100644
--- a/tests/e2e/common.go
+++ b/tests/e2e/common.go
@@ -15,16 +15,18 @@ import (
 	simtestutil "github.com/cosmos/cosmos-sdk/testutil/sims"
 	"github.com/cosmos/cosmos-sdk/types/module/testutil"
 	"github.com/cosmos/cosmos-sdk/x/auth"
+	"github.com/cosmos/cosmos-sdk/x/staking"
 
 	laconicApp "git.vdb.to/cerc-io/laconic2d/app"
+	"git.vdb.to/cerc-io/laconic2d/app/params"
 	auctionmodule "git.vdb.to/cerc-io/laconic2d/x/auction/module"
 	bondmodule "git.vdb.to/cerc-io/laconic2d/x/bond/module"
 	registrymodule "git.vdb.to/cerc-io/laconic2d/x/registry/module"
 )
 
-// NewTestNetworkFixture returns a new simapp AppConstructor for network simulation tests
+// NewTestNetworkFixture returns a new LaconicApp AppConstructor for network simulation tests
 func NewTestNetworkFixture() network.TestFixture {
-	dir, err := os.MkdirTemp("", "simapp")
+	dir, err := os.MkdirTemp("", "laconic")
 	if err != nil {
 		panic(fmt.Sprintf("failed creating temporary directory: %v", err))
 	}
@@ -50,11 +52,15 @@ func NewTestNetworkFixture() network.TestFixture {
 		return app
 	}
 
+	// Update prefixes
+	params.SetAddressPrefixes()
+
 	return network.TestFixture{
 		AppConstructor: appCtr,
 		GenesisState:   app.DefaultGenesis(),
 		EncodingConfig: testutil.MakeTestEncodingConfig(
 			auth.AppModuleBasic{},
+			staking.AppModuleBasic{},
 			auctionmodule.AppModule{},
 			bondmodule.AppModule{},
 			registrymodule.AppModule{},