diff --git a/dagger/pipeline.go b/dagger/pipeline.go
index 10c5bdd0..8a305c86 100644
--- a/dagger/pipeline.go
+++ b/dagger/pipeline.go
@@ -369,7 +369,7 @@ func (p *Pipeline) mount(ctx context.Context, dest string, mnt *compiler.Value)
 					llb.CacheMountShared,
 				),
 			), nil
-		case "tmp":
+		case "tmpfs":
 			return llb.AddMount(
 				dest,
 				llb.Scratch(),
diff --git a/stdlib/dagger/dagger.cue b/stdlib/dagger/dagger.cue
index ec86213a..41b27241 100644
--- a/stdlib/dagger/dagger.cue
+++ b/stdlib/dagger/dagger.cue
@@ -39,7 +39,7 @@ package dagger
 	env?: [string]: string
 	always?: true | *false
 	dir:     string | *"/"
-	mount: [string]: "tmp" | "cache" | {from: _, path: string | *"/"}
+	mount: [string]: "tmpfs" | "cache" | {from: _, path: string | *"/"}
 }
 
 #FetchContainer: {
diff --git a/tests/mounts/valid/tmpfs/main.cue b/tests/mounts/valid/tmpfs/main.cue
index 974c3dd8..636a68cc 100644
--- a/tests/mounts/valid/tmpfs/main.cue
+++ b/tests/mounts/valid/tmpfs/main.cue
@@ -11,10 +11,19 @@ test: {
 		{
 			do: "exec"
 			args: ["sh", "-c", """
-					echo "NOT SURE WHAT TO TEST YET" > /out
+				echo ok > /out
+				echo ok > /tmpdir/out
 				"""]
 			dir: "/"
-			mount: something: "tmpfs"
+			mount: "/tmpdir": "tmpfs"
+		},
+		{
+			do: "exec"
+			args: ["sh", "-c", """
+			[ -f /out ] || exit 1
+			# content of /cache/tmp must not exist in this layer
+			[ ! -f /tmpdir/out ] || exit 1
+			"""]
 		},
 		{
 			do:     "export"
diff --git a/tests/test.sh b/tests/test.sh
index 8961a16b..30ac0984 100755
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -207,13 +207,13 @@ test::local(){
 
 
 test::mount(){
-  disable test::one "Mount: tmpfs (FIXME https://github.com/blocklayerhq/dagger/issues/46)" --exit=0 \
+  test::one "Mount: tmpfs" --exit=0 \
       "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/mounts/valid/tmpfs
 
-  test::one "Mount: cache (FIXME https://github.com/blocklayerhq/dagger/issues/46)" --exit=0 \
+  test::one "Mount: cache" --exit=0 \
       "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/mounts/valid/cache
 
-  test::one "Mount: component (FIXME https://github.com/blocklayerhq/dagger/issues/46)" --exit=0  --stdout='{"test":"hello world"}' \
+  test::one "Mount: component" --exit=0  --stdout='{"test":"hello world"}' \
       "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/mounts/valid/component
 
   disable test::one "Mount: script (FIXME https://github.com/blocklayerhq/dagger/issues/46)" --exit=0 \