diff --git a/tests/e2e/auction/grpc.go b/tests/e2e/auction/grpc.go
index f4503d49..ad3cabc2 100644
--- a/tests/e2e/auction/grpc.go
+++ b/tests/e2e/auction/grpc.go
@@ -169,23 +169,29 @@ func (ets *E2ETestSuite) TestGetBidGrpc() {
 		url             string
 		errorMsg        string
 		isErrorExpected bool
+		preRun          func() string
 	}{
 		{
 			"invalid request to get bid",
-			fmt.Sprintf("%s/%s/", reqURL, randomAuctionID),
+			reqURL,
 			"",
 			true,
+			func() string { return randomAuctionID },
 		},
 		{
 			"valid request to get bid",
-			fmt.Sprintf("%s/%s/%s", reqURL, randomAuctionID, randomBidderAddress),
+			reqURL,
 			"",
 			false,
+			func() string { return ets.createAuctionAndBid(false, true) },
 		},
 	}
 	for _, tc := range testCases {
 		ets.Run(tc.msg, func() {
+			auctionID := tc.preRun()
+			tc.url += auctionID + "/" + bidderAddress
 			resp, err := testutil.GetRequest(tc.url)
+
 			if tc.isErrorExpected {
 				sr.Contains(string(resp), tc.errorMsg)
 			} else {
diff --git a/tests/e2e/auction/suite.go b/tests/e2e/auction/suite.go
index 844c323d..5cd1f3dc 100644
--- a/tests/e2e/auction/suite.go
+++ b/tests/e2e/auction/suite.go
@@ -39,15 +39,16 @@ func NewE2ETestSuite(cfg network.Config) *E2ETestSuite {
 }
 
 func (ets *E2ETestSuite) SetupSuite() { //nolint: all
+	sr := ets.Require()
 	ets.T().Log("setting up e2e test suite")
 
 	var err error
 
 	ets.network, err = network.New(ets.T(), ets.T().TempDir(), ets.cfg)
-	ets.Require().NoError(err)
+	sr.NoError(err)
 
 	_, err = ets.network.WaitForHeight(1)
-	ets.Require().NoError(err)
+	sr.NoError(err)
 
 	// setting up random owner and bidder accounts
 	ets.createAccountWithBalance(ownerAccount, &ownerAddress)
@@ -78,11 +79,15 @@ func (ets *E2ETestSuite) createAccountWithBalance(accountName string, accountAdd
 		fmt.Sprintf("--%s=%s", flags.FlagFrom, accountName),
 		fmt.Sprintf("--%s=true", flags.FlagSkipConfirmation),
 		fmt.Sprintf("--%s=json", flags.FlagOutput),
-		fmt.Sprintf("--%s=%s", flags.FlagBroadcastMode, flags.BroadcastSync), // TODO
+		fmt.Sprintf("--%s=%s", flags.FlagBroadcastMode, flags.BroadcastSync),
 		fmt.Sprintf("--%s=%s", flags.FlagFees, sdk.NewCoins(sdk.NewCoin(ets.cfg.BondDenom, math.NewInt(10))).String()),
 	)
 	sr.NoError(err)
 	*accountAddress = newAddr.String()
+
+	// wait for tx to take effect
+	err = ets.network.WaitForNextBlock()
+	sr.NoError(err)
 }
 
 func (ets *E2ETestSuite) createAuctionAndBid(createAuction, createBid bool) string {
@@ -90,9 +95,6 @@ func (ets *E2ETestSuite) createAuctionAndBid(createAuction, createBid bool) stri
 	sr := ets.Require()
 	auctionId := ""
 
-	err := ets.network.WaitForNextBlock()
-	sr.NoError(err)
-
 	if createAuction {
 		auctionArgs := []string{
 			sampleCommitTime, sampleRevealTime,
diff --git a/tests/e2e/auction/tx.go b/tests/e2e/auction/tx.go
index 419dcbd3..1675d25e 100644
--- a/tests/e2e/auction/tx.go
+++ b/tests/e2e/auction/tx.go
@@ -7,6 +7,9 @@ import (
 	clitestutil "github.com/cosmos/cosmos-sdk/testutil/cli"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/spf13/cobra"
+
+	auctiontypes "git.vdb.to/cerc-io/laconic2d/x/auction"
+	"git.vdb.to/cerc-io/laconic2d/x/auction/client/cli"
 )
 
 const (
@@ -15,6 +18,63 @@ const (
 	placeholderAuctionId = "placeholder_auction_id"
 )
 
+func (ets *E2ETestSuite) TestTxCommitBid() {
+	val := ets.network.Validators[0]
+	sr := ets.Require()
+	testCases := []struct {
+		msg           string
+		args          []string
+		createAuction bool
+	}{
+		{
+			"commit bid with missing args",
+			[]string{fmt.Sprintf("200%s", ets.cfg.BondDenom)},
+			false,
+		},
+		{
+			"commit bid with valid args",
+			[]string{
+				placeholderAuctionId,
+				fmt.Sprintf("200%s", ets.cfg.BondDenom),
+			},
+			true,
+		},
+	}
+
+	for _, test := range testCases {
+		ets.Run(fmt.Sprintf("Case %s", test.msg), func() {
+			if test.createAuction {
+				auctionArgs := []string{
+					sampleCommitTime, sampleRevealTime,
+					fmt.Sprintf("10%s", ets.cfg.BondDenom),
+					fmt.Sprintf("10%s", ets.cfg.BondDenom),
+					fmt.Sprintf("100%s", ets.cfg.BondDenom),
+				}
+
+				_, err := ets.executeTx(cli.GetCmdCreateAuction(), auctionArgs, ownerAccount)
+				sr.NoError(err)
+
+				out, err := clitestutil.ExecTestCLICmd(val.ClientCtx, cli.GetCmdList(),
+					[]string{fmt.Sprintf("--%s=json", flags.FlagOutput)})
+				sr.NoError(err)
+				var queryResponse auctiontypes.QueryAuctionsResponse
+				err = val.ClientCtx.Codec.UnmarshalJSON(out.Bytes(), &queryResponse)
+				sr.NoError(err)
+				sr.NotNil(queryResponse.GetAuctions())
+				test.args[0] = queryResponse.GetAuctions().Auctions[0].Id
+			}
+
+			resp, err := ets.executeTx(cli.GetCmdCommitBid(), test.args, bidderAccount)
+			if test.createAuction {
+				sr.NoError(err)
+				sr.Zero(resp.Code)
+			} else {
+				sr.Error(err)
+			}
+		})
+	}
+}
+
 func (ets *E2ETestSuite) executeTx(cmd *cobra.Command, args []string, caller string) (sdk.TxResponse, error) {
 	val := ets.network.Validators[0]
 	additionalArgs := []string{
diff --git a/tests/e2e/common.go b/tests/e2e/common.go
index 12adbffc..7a746eb1 100644
--- a/tests/e2e/common.go
+++ b/tests/e2e/common.go
@@ -18,10 +18,11 @@ import (
 	"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"
+
+	_ "git.vdb.to/cerc-io/laconic2d/app/params" // import for side-effects (see init)
 )
 
 // NewTestNetworkFixture returns a new LaconicApp AppConstructor for network simulation tests
@@ -52,9 +53,6 @@ func NewTestNetworkFixture() network.TestFixture {
 		return app
 	}
 
-	// Update prefixes
-	params.SetAddressPrefixes()
-
 	return network.TestFixture{
 		AppConstructor: appCtr,
 		GenesisState:   app.DefaultGenesis(),