diff --git a/CHANGELOG.md b/CHANGELOG.md
index bcdcf73020..f8157594ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,10 +6,10 @@ FEATURES
 
 IMPROVEMENTS
 * export command now writes current validator set for Tendermint
+* [tests] Application module tests now use a mock application
 
 FIXES
 * [lcd] Switch to bech32 for addresses on all human readable inputs and outputs
-* [lcd] Switch to bech32 for addresses on all human readable inputs and outputs
 
 ## 0.18.0
 
diff --git a/examples/basecoin/app/app_test.go b/examples/basecoin/app/app_test.go
index 521516d472..23bc531c03 100644
--- a/examples/basecoin/app/app_test.go
+++ b/examples/basecoin/app/app_test.go
@@ -19,12 +19,10 @@ import (
 	"github.com/tendermint/tmlibs/log"
 )
 
-var accName = "foobart"
-
 func setGenesis(bapp *BasecoinApp, accs ...auth.BaseAccount) error {
 	genaccs := make([]*types.GenesisAccount, len(accs))
 	for i, acc := range accs {
-		genaccs[i] = types.NewGenesisAccount(&types.AppAccount{acc, accName})
+		genaccs[i] = types.NewGenesisAccount(&types.AppAccount{acc, "foobart"})
 	}
 
 	genesisState := types.GenesisState{
diff --git a/x/auth/mock/auth_app_test.go b/x/auth/mock/auth_app_test.go
index a3ff6710ee..641c8a3665 100644
--- a/x/auth/mock/auth_app_test.go
+++ b/x/auth/mock/auth_app_test.go
@@ -1,7 +1,6 @@
 package mock
 
 import (
-	"fmt"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -42,70 +41,55 @@ func getMockApp(t *testing.T) *App {
 }
 
 func TestMsgChangePubKey(t *testing.T) {
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 0")
 	mapp := getMockApp(t)
 
 	// Construct some genesis bytes to reflect basecoin/types/AppAccount
 	// Give 77 foocoin to the first key
 	coins := sdk.Coins{{"foocoin", 77}}
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 1")
 	acc1 := &auth.BaseAccount{
 		Address: addr1,
 		Coins:   coins,
 	}
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 3")
 	accs := []auth.Account{acc1}
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 4")
 
 	// Construct genesis state
 	SetGenesis(mapp, accs)
 
 	// A checkTx context (true)
 	ctxCheck := mapp.BaseApp.NewContext(true, abci.Header{})
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 5")
 	res1 := mapp.AccountMapper.GetAccount(ctxCheck, addr1)
 	assert.Equal(t, acc1, res1.(*auth.BaseAccount))
 
 	// Run a CheckDeliver
 	SignCheckDeliver(t, mapp.BaseApp, sendMsg1, []int64{0}, true, priv1)
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 6")
 
 	// Check balances
 	CheckBalance(t, mapp, addr1, sdk.Coins{{"foocoin", 67}})
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 7")
 	CheckBalance(t, mapp, addr2, sdk.Coins{{"foocoin", 10}})
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 8")
 
 	changePubKeyMsg := auth.MsgChangeKey{
 		Address:   addr1,
 		NewPubKey: priv2.PubKey(),
 	}
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 10")
 
 	ctxDeliver := mapp.BaseApp.NewContext(false, abci.Header{})
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 11")
 	acc2 := mapp.AccountMapper.GetAccount(ctxDeliver, addr1)
 
 	// send a MsgChangePubKey
 	SignCheckDeliver(t, mapp.BaseApp, changePubKeyMsg, []int64{1}, true, priv1)
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 12")
 	acc2 = mapp.AccountMapper.GetAccount(ctxDeliver, addr1)
 
 	assert.True(t, priv2.PubKey().Equals(acc2.GetPubKey()))
 
 	// signing a SendMsg with the old privKey should be an auth error
 	tx := GenTx(sendMsg1, []int64{2}, priv1)
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 13")
 	res := mapp.Deliver(tx)
 	assert.Equal(t, sdk.ToABCICode(sdk.CodespaceRoot, sdk.CodeUnauthorized), res.Code, res.Log)
 
 	// resigning the tx with the new correct priv key should work
 	SignCheckDeliver(t, mapp.BaseApp, sendMsg1, []int64{2}, true, priv2)
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 14")
 
 	// Check balances
 	CheckBalance(t, mapp, addr1, sdk.Coins{{"foocoin", 57}})
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 15")
 	CheckBalance(t, mapp, addr2, sdk.Coins{{"foocoin", 20}})
-	fmt.Println("wackydebugoutput TestMsgChangePubKey 16")
 }