diff --git a/pkg/cosmos/config/config.go b/pkg/cosmos/config/config.go
index 163ec676..77d73b1e 100644
--- a/pkg/cosmos/config/config.go
+++ b/pkg/cosmos/config/config.go
@@ -151,11 +151,12 @@ func (n *Node) ValidateConfig() (err error) {
 type TOMLConfigs []*TOMLConfig
 
 func (cs TOMLConfigs) validateKeys() (err error) {
+	var errSlice []error
 	// Unique chain IDs
 	chainIDs := config.UniqueStrings{}
 	for i, c := range cs {
 		if chainIDs.IsDupe(c.ChainID) {
-			err = errors.Join(err, config.NewErrDuplicate(fmt.Sprintf("%d.ChainID", i), *c.ChainID))
+			errSlice = append(errSlice, config.NewErrDuplicate(fmt.Sprintf("%d.ChainID", i), *c.ChainID))
 		}
 	}
 
@@ -164,7 +165,7 @@ func (cs TOMLConfigs) validateKeys() (err error) {
 	for i, c := range cs {
 		for j, n := range c.Nodes {
 			if names.IsDupe(n.Name) {
-				err = errors.Join(err, config.NewErrDuplicate(fmt.Sprintf("%d.Nodes.%d.Name", i, j), *n.Name))
+				errSlice = append(errSlice, config.NewErrDuplicate(fmt.Sprintf("%d.Nodes.%d.Name", i, j), *n.Name))
 			}
 		}
 	}
@@ -175,11 +176,12 @@ func (cs TOMLConfigs) validateKeys() (err error) {
 		for j, n := range c.Nodes {
 			u := (*url.URL)(n.TendermintURL)
 			if urls.IsDupeFmt(u) {
-				err = errors.Join(err, config.NewErrDuplicate(fmt.Sprintf("%d.Nodes.%d.TendermintURL", i, j), u.String()))
+				errSlice = append(errSlice, config.NewErrDuplicate(fmt.Sprintf("%d.Nodes.%d.TendermintURL", i, j), u.String()))
 			}
 		}
 	}
-	return
+
+	return errors.Join(errSlice...)
 }
 
 func (cs TOMLConfigs) ValidateConfig() (err error) {
@@ -297,17 +299,18 @@ func setFromChain(c, f *Chain) {
 }
 
 func (c *TOMLConfig) ValidateConfig() (err error) {
+	var errSlice []error
 	if c.ChainID == nil {
-		err = errors.Join(err, config.ErrMissing{Name: "ChainID", Msg: "required for all chains"})
+		errSlice = append(errSlice, config.ErrMissing{Name: "ChainID", Msg: "required for all chains"})
 	} else if *c.ChainID == "" {
-		err = errors.Join(err, config.ErrEmpty{Name: "ChainID", Msg: "required for all chains"})
+		errSlice = append(errSlice, config.ErrEmpty{Name: "ChainID", Msg: "required for all chains"})
 	}
 
 	if len(c.Nodes) == 0 {
-		err = errors.Join(err, config.ErrMissing{Name: "Nodes", Msg: "must have at least one node"})
+		errSlice = append(errSlice, config.ErrMissing{Name: "Nodes", Msg: "must have at least one node"})
 	}
 
-	return
+	return errors.Join(errSlice...)
 }
 
 func (c *TOMLConfig) TOMLString() (string, error) {