diff --git a/app/app.go b/app/app.go
index 8c535f2..9448fff 100644
--- a/app/app.go
+++ b/app/app.go
@@ -128,7 +128,7 @@ import (
 )
 
 const (
-	AccountAddressPrefix = "cosmos"
+	AccountAddressPrefix = "plmnt"
 	Name                 = "planetmint-go"
 )
 
diff --git a/app/app_test.go b/app/app_test.go
new file mode 100644
index 0000000..e2c6874
--- /dev/null
+++ b/app/app_test.go
@@ -0,0 +1,13 @@
+package app
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// TestAccountAddressPrefix makes sure that the account address prefix has a certain value.
+func TestAccountAddressPrefix(t *testing.T) {
+	accountAddressPrefix := "plmnt"
+	assert.Equal(t, AccountAddressPrefix, accountAddressPrefix, "The account address prefix should be 'plmnt'.")
+}