diff --git a/waspc/src/Wasp/AppSpec/Core/Decl.hs b/waspc/src/Wasp/AppSpec/Core/Decl.hs
index 6d82175152..bbe6bddd22 100644
--- a/waspc/src/Wasp/AppSpec/Core/Decl.hs
+++ b/waspc/src/Wasp/AppSpec/Core/Decl.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE TupleSections #-}
+{-# LANGUAGE TypeApplications #-}
 
 module Wasp.AppSpec.Core.Decl
   ( Decl,
@@ -9,9 +10,20 @@ module Wasp.AppSpec.Core.Decl
   )
 where
 
+import Control.Applicative ((<|>))
 import Data.Maybe (mapMaybe)
 import Data.Typeable (cast)
+import Wasp.AppSpec.Action (Action)
+import Wasp.AppSpec.Api (Api)
+import Wasp.AppSpec.ApiNamespace (ApiNamespace)
+import Wasp.AppSpec.App (App)
 import Wasp.AppSpec.Core.IsDecl (IsDecl)
+import Wasp.AppSpec.Crud (Crud)
+import Wasp.AppSpec.Entity (Entity)
+import Wasp.AppSpec.Job (Job)
+import Wasp.AppSpec.Page (Page)
+import Wasp.AppSpec.Query (Query)
+import Wasp.AppSpec.Route (Route)
 
 -- | A container for any (IsDecl a) type, allowing you to have a heterogenous list of
 --   Wasp declarations as [Decl].
@@ -19,6 +31,20 @@ import Wasp.AppSpec.Core.IsDecl (IsDecl)
 data Decl where
   Decl :: (IsDecl a) => String -> a -> Decl
 
+instance Show Decl where
+  show decl =
+    show $
+      (show <$> fromDecl @Api decl)
+        <|> (show <$> fromDecl @Route decl)
+        <|> (show <$> fromDecl @Crud decl)
+        <|> (show <$> fromDecl @App decl)
+        <|> (show <$> fromDecl @Action decl)
+        <|> (show <$> fromDecl @Job decl)
+        <|> (show <$> fromDecl @Entity decl)
+        <|> (show <$> fromDecl @Page decl)
+        <|> (show <$> fromDecl @ApiNamespace decl)
+        <|> (show <$> fromDecl @Query decl)
+
 -- | Extracts all declarations of a certain type from a @[Decl]@s
 takeDecls :: (IsDecl a) => [Decl] -> [(String, a)]
 takeDecls = mapMaybe fromDecl
diff --git a/waspc/test/AppSpec/FromJSONTest.hs b/waspc/test/AppSpec/FromJSONTest.hs
index b4af9e4125..1d0d2d8e7b 100644
--- a/waspc/test/AppSpec/FromJSONTest.hs
+++ b/waspc/test/AppSpec/FromJSONTest.hs
@@ -278,8 +278,8 @@ spec_AppSpecFromJSON = do
               }
           )
   where
-    extNamedImportJson = [trimming| { "kind": "named", "name" : "foo", "path": "folder/file.js" }|]
-    extDefaultImportJson = [trimming| { "kind": "default", "name" : "foo", "path": "folder/subfolder/file.js" }|]
+    extNamedImportJson = [trimming| { "kind": "named", "name" : "foo", "path": "@src/folder/file.js" }|]
+    extDefaultImportJson = [trimming| { "kind": "default", "name" : "foo", "path": "@src/folder/subfolder/file.js" }|]
 
     fooEntityRef = [trimming| { "name": "foo", "declType": "Entity" }|]
     barEntityRef = [trimming| { "name": "bar", "declType": "Entity" }|]