diff --git a/src/Ccap/Codegen/Imports.purs b/src/Ccap/Codegen/Imports.purs
index 3b4a3bd..c85f4cc 100644
--- a/src/Ccap/Codegen/Imports.purs
+++ b/src/Ccap/Codegen/Imports.purs
@@ -3,9 +3,12 @@ module Ccap.Codegen.Imports
   , Imported
   , Includes
   , importInScope
+  , importPath
   , importsInScope
   , importsInScopes
   , parseImports
+  , possibleImportPaths
+  , resolveImport
   , validateImports
   ) where
 
@@ -32,7 +35,7 @@ type FoundImport
   = { imprt :: Import, filePath :: FilePath }
 
 type Imported
-  = { imprt :: Import, mod :: Module }
+  = Source { imprt :: Import, mod :: Module }
 
 data ImportError
   = NotFound Module Import
@@ -42,18 +45,26 @@ data ImportError
 instance importValidationError :: ValidationError ImportError where
   printError = case _ of
     NotFound mod imprt ->
-      mod.name <> " tried to import module: " <> imprt
+      mod.name
+        <> " tried to import module: "
+        <> imprt
         <> " but it does not exist, or was not included."
-    ParseError imprt message -> "Parsing imported module, " <> imprt <> ", failed with error: " <> message
+    ParseError imprt message ->
+      "Parsing imported module, "
+        <> imprt
+        <> ", failed with error: "
+        <> message
+
+importPath :: Import -> FilePath
+importPath = String.replaceAll (Pattern ".") (Replacement Path.sep)
+
+resolveImport :: FilePath -> Import -> FilePath
+resolveImport filePath = FS.joinPaths filePath <<< flip append ".tmpl" <<< importPath
 
 possibleImportPaths :: Includes -> FilePath -> Import -> Array FilePath
 possibleImportPaths includes source imprt =
-  let
-    sourceDirs = Path.dirname source : includes
-
-    importPath = String.replaceAll (Pattern ".") (Replacement Path.sep) imprt
-  in
-    sourceDirs <#> flip FS.joinPaths importPath <#> flip append ".tmpl"
+  (Path.dirname source : includes)
+    <#> (flip resolveImport $ importPath imprt)
 
 importInScope :: Includes -> Source Module -> Import -> Effect (Either ImportError FoundImport)
 importInScope included { source, contents } imprt =
@@ -90,7 +101,10 @@ importsInScopes includes sources =
 parseImports :: Array FoundImport -> Effect (Either (Array ImportError) (Array Imported))
 parseImports imports = traverse parse imports <#> toValidation
   where
-  parse { imprt, filePath } = bimap (ParseError imprt) (\source -> { imprt, mod: source.contents }) <$> FS.sourceFile filePath
+  parse { imprt, filePath } =
+    bimap (ParseError imprt)
+      (\source -> { source: filePath, contents: { imprt, mod: source.contents } })
+      <$> FS.sourceFile filePath
 
 -- | Validate that the imports of the given modules exist and parse the imported modules
 -- | Note: Does not validate the contents of the imported files.
diff --git a/src/Ccap/Codegen/Module.purs b/src/Ccap/Codegen/Module.purs
index 88e21e7..d8af825 100644
--- a/src/Ccap/Codegen/Module.purs
+++ b/src/Ccap/Codegen/Module.purs
@@ -4,13 +4,15 @@ module Ccap.Codegen.Module
   ) where
 
 import Prelude
-import Ccap.Codegen.Imports (Imported, Includes, validateImports)
+import Ccap.Codegen.Imports (Imported, Includes, possibleImportPaths, validateImports)
 import Ccap.Codegen.TypeRef (validateAllTypeRefs)
 import Ccap.Codegen.Types (Module, Source, ValidatedModule)
-import Ccap.Codegen.ValidationError (class ValidationError, printError)
+import Ccap.Codegen.ValidationError (printError)
 import Control.Monad.Except (ExceptT(..), except, runExceptT, withExceptT)
-import Control.MonadPlus (guard)
+import Data.Array as Array
+import Data.Bifunctor (lmap)
 import Data.Either (Either)
+import Data.Foldable (any)
 import Data.Traversable (for)
 import Effect (Effect)
 
@@ -21,27 +23,36 @@ validateModules ::
   Effect (Either (Array String) (Array (Source ValidatedModule)))
 validateModules includes sources =
   runExceptT do
-    allImports <- withErrors $ ExceptT $ validateImports includes sources
-    withErrors $ except
-      $ for sources \source -> do
-          let
-            mod = source.contents
-
-            imports = importsForModule mod allImports
-          _ <- validateAllTypeRefs mod imports
-          pure $ source { contents = mod { imports = imports } }
-
-withErrors ::
-  forall f e a.
-  Functor f =>
-  ValidationError e =>
-  ExceptT (Array e) f a ->
-  ExceptT (Array String) f a
-withErrors = withExceptT $ map printError
-
-importsForModule :: Module -> Array Imported -> Array Module
-importsForModule mod imports = do
-  imported <- imports
-  imprt <- mod.imports
-  guard $ imprt == imported.imprt
-  pure $ imported.mod
+    allImports <- withExceptT (map printError) $ ExceptT $ validateImports includes sources
+    except $ for sources $ validateModule includes allImports
+
+validateModule ::
+  Includes ->
+  Array Imported ->
+  Source Module ->
+  Either (Array String) (Source ValidatedModule)
+validateModule includes allImports source =
+  let
+    imports = importsForModule includes source allImports
+
+    validatedSource = source { contents = source.contents { imports = imports } }
+
+    validations = lmap (map printError) $ validateAllTypeRefs source.contents imports
+  in
+    validations *> pure validatedSource
+
+importsForModule :: Includes -> Source Module -> Array Imported -> Array Module
+importsForModule includes source =
+  map _.contents.mod
+    <<< Array.filter (isImportedBy includes source)
+
+-- This was already done by validateImports, we should adjust the return type of that so we don't
+-- have to do this again.
+isImportedBy :: Includes -> Source Module -> Imported -> Boolean
+isImportedBy includes source imported =
+  let
+    { source: modulePath, contents: { imports } } = source
+
+    { source: importPath, contents: { imprt, mod: { name } } } = imported
+  in -- TODO: this is almost identical to importInScope
+    any (eq importPath) $ possibleImportPaths includes modulePath =<< imports
diff --git a/test/Ccap/Codegen/Imports.purs b/test/Ccap/Codegen/Imports.purs
index 2e0ab15..cf8bf2c 100644
--- a/test/Ccap/Codegen/Imports.purs
+++ b/test/Ccap/Codegen/Imports.purs
@@ -5,11 +5,13 @@ module Test.Ccap.Codegen.Imports
 import Prelude
 import Ccap.Codegen.FileSystem as FS
 import Ccap.Codegen.Imports (importsInScope, validateImports)
+import Ccap.Codegen.Module (validateModules)
 import Ccap.Codegen.TypeRef (validateAllTypeRefs)
 import Ccap.Codegen.ValidationError (class ValidationError, printError)
 import Control.Monad.Except (ExceptT(..), except, runExceptT, withExceptT)
 import Data.Either (either)
 import Data.Foldable (fold)
+import Data.Traversable (intercalate, sequence, traverse)
 import Effect.Class (liftEffect)
 import Node.Path (FilePath)
 import Node.Path as Path
@@ -17,14 +19,20 @@ import Test.Ccap.Codegen.Util (eqElems, shouldBeLeft, shouldBeRight)
 import Test.Spec (Spec, describe, it)
 import Test.Spec.Assertions (shouldSatisfy)
 
-root :: FilePath
-root = "./test/resources/includes/"
+resources :: FilePath
+resources = "./test/resources/"
+
+imports_ :: FilePath
+imports_ = Path.concat [ resources, "imports" ]
+
+includes_ :: FilePath
+includes_ = Path.concat [ resources, "includes" ]
 
 internal_ :: FilePath
-internal_ = Path.concat [ root, "internal" ]
+internal_ = Path.concat [ includes_, "internal" ]
 
 external_ :: FilePath
-external_ = Path.concat [ root, "external" ]
+external_ = Path.concat [ includes_, "external" ]
 
 internal :: FilePath -> FilePath
 internal fileName = Path.concat [ internal_, fileName ]
@@ -44,6 +52,12 @@ externalSource = internal "SourceExternal.tmpl"
 externalSubmoduleSource :: FilePath
 externalSubmoduleSource = internal "SourceExternalSubmodule.tmpl"
 
+app1 :: FilePath
+app1 = Path.concat [ imports_, "app1", "Main.tmpl" ]
+
+app2 :: FilePath
+app2 = Path.concat [ imports_, "app2", "Main.tmpl" ]
+
 withPrintErrors ∷ ∀ e m a. ValidationError e ⇒ Monad m ⇒ ExceptT (Array e) m a → ExceptT String m a
 withPrintErrors = withExceptT $ fold <<< map printError
 
@@ -77,6 +91,15 @@ specs =
                 withPrintErrors $ ExceptT $ validateImports includes [ source ]
         shouldBeRight imports
 
+    itCanValidateAllModules filePaths includes =
+      it "Can validate all modules" do
+        modules <-
+          liftEffect
+            $ runExceptT do
+                sources <- ExceptT $ map sequence $ traverse FS.sourceFile filePaths
+                withExceptT (intercalate "|") $ ExceptT $ validateModules includes sources
+        shouldBeRight modules
+
     itFailsWithoutIncludes filePath =
       it "Fails validation without including the external folder" do
         let
@@ -95,7 +118,7 @@ specs =
             $ runExceptT do
                 source <- ExceptT $ FS.sourceFile filePath
                 imports <- withPrintErrors $ ExceptT $ validateImports includes [ source ]
-                withPrintErrors $ except $ validateAllTypeRefs source.contents (imports <#> _.mod)
+                withPrintErrors $ except $ validateAllTypeRefs source.contents (imports <#> _.contents.mod)
         shouldBeRight typeDecls
   in
     describe "template include syntax" do
@@ -115,6 +138,7 @@ specs =
         itCanFindImports submoduleSource []
         itCanValidateImports submoduleSource []
         itHasValidTypeReferences submoduleSource []
+        itCanValidateAllModules [ submoduleSource ] []
       describe "a file with an external reference" do
         itCanBeParsed externalSource
         itHasImports externalSource [ "External" ]
@@ -122,6 +146,7 @@ specs =
         itCanValidateImports externalSource [ external_ ]
         itFailsWithoutIncludes externalSource
         itHasValidTypeReferences externalSource [ external_ ]
+        itCanValidateAllModules [ externalSource ] [ external_ ]
       describe "a file with an external reference to a submodule" do
         itCanBeParsed externalSubmoduleSource
         itHasImports externalSubmoduleSource [ "submodule.ExternalSubmodule" ]
@@ -129,3 +154,6 @@ specs =
         itCanValidateImports externalSubmoduleSource [ external_ ]
         itFailsWithoutIncludes externalSubmoduleSource
         itHasValidTypeReferences externalSubmoduleSource [ external_ ]
+        itCanValidateAllModules [ externalSubmoduleSource ] [ external_ ]
+      describe "two files with identical relative imports"
+        $ itCanValidateAllModules [ app1, app2 ] []
diff --git a/test/resources/imports/app1/Main.tmpl b/test/resources/imports/app1/Main.tmpl
new file mode 100644
index 0000000..e0099c0
--- /dev/null
+++ b/test/resources/imports/app1/Main.tmpl
@@ -0,0 +1,6 @@
+scala: test.App1
+purs: Test.App1
+
+import Types
+
+type App: Types.Foo
diff --git a/test/resources/imports/app1/Types.tmpl b/test/resources/imports/app1/Types.tmpl
new file mode 100644
index 0000000..5b7e702
--- /dev/null
+++ b/test/resources/imports/app1/Types.tmpl
@@ -0,0 +1,4 @@
+scala: test.Lib1
+purs: Test.Lib1
+
+type Foo: Int
diff --git a/test/resources/imports/app2/Main.tmpl b/test/resources/imports/app2/Main.tmpl
new file mode 100644
index 0000000..8d153ac
--- /dev/null
+++ b/test/resources/imports/app2/Main.tmpl
@@ -0,0 +1,6 @@
+scala: test.App2
+purs: Test.App2
+
+import Types
+
+type App: Types.Bar
diff --git a/test/resources/imports/app2/Types.tmpl b/test/resources/imports/app2/Types.tmpl
new file mode 100644
index 0000000..bef2130
--- /dev/null
+++ b/test/resources/imports/app2/Types.tmpl
@@ -0,0 +1,4 @@
+scala: test.Lib2
+purs: Test.Lib2
+
+type Bar: Int