12 files changed, 13 insertions, 8 deletions
diff --git a/src/test/resources/features/AsyncResetTester.fir b/src/test/resources/features/AsyncResetTester.fir
index 15efbd8d..3066e4bb 100644
--- a/src/test/resources/features/AsyncResetTester.fir
+++ b/src/test/resources/features/AsyncResetTester.fir
@@ -1,4 +1,4 @@
-
+; SPDX-License-Identifier: Apache-2.0
 circuit AsyncResetTester :
   module AsyncResetTester :
     input clock : Clock
diff --git a/src/test/resources/features/ChirrtlMems.fir b/src/test/resources/features/ChirrtlMems.fir
index de5b3cf3..fa9ec1c0 100644
--- a/src/test/resources/features/ChirrtlMems.fir
+++ b/src/test/resources/features/ChirrtlMems.fir
@@ -1,4 +1,4 @@
-; See LICENSE for license details.
+; SPDX-License-Identifier: Apache-2.0
 circuit ChirrtlMems :
   module ChirrtlMems :
     input clock : Clock
diff --git a/src/test/resources/features/CustomTransform.fir b/src/test/resources/features/CustomTransform.fir
index de00f261..99cb1800 100644
--- a/src/test/resources/features/CustomTransform.fir
+++ b/src/test/resources/features/CustomTransform.fir
@@ -1,4 +1,4 @@
-; See LICENSE for license details.
+; SPDX-License-Identifier: Apache-2.0
 circuit CustomTransform :
   ; Replaced in custom transform by an implementation
   extmodule Delay :
diff --git a/src/test/resources/features/EmptyChirrtlMem.fir b/src/test/resources/features/EmptyChirrtlMem.fir
index 036d3830..56f3798e 100644
--- a/src/test/resources/features/EmptyChirrtlMem.fir
+++ b/src/test/resources/features/EmptyChirrtlMem.fir
@@ -1,3 +1,5 @@
+; SPDX-License-Identifier: Apache-2.0
+
 circuit Queue :
   module Queue :
     input clock : Clock
diff --git a/src/test/resources/features/HasDeadCode.fir b/src/test/resources/features/HasDeadCode.fir
index db87ff7a..a634388f 100644
--- a/src/test/resources/features/HasDeadCode.fir
+++ b/src/test/resources/features/HasDeadCode.fir
@@ -1,3 +1,4 @@
+; SPDX-License-Identifier: Apache-2.0
 circuit HasDeadCode :
   module HasDeadCode :
     input i : UInt<1>
diff --git a/src/test/resources/features/HasLoops.fir b/src/test/resources/features/HasLoops.fir
index e238761d..341937fa 100644
--- a/src/test/resources/features/HasLoops.fir
+++ b/src/test/resources/features/HasLoops.fir
@@ -1,3 +1,4 @@
+; SPDX-License-Identifier: Apache-2.0
 circuit HasLoops :
   module HasLoops :
     input i : UInt<1>
diff --git a/src/test/resources/features/NestedSubAccessTester.fir b/src/test/resources/features/NestedSubAccessTester.fir
index 84b4cfbe..f81ab251 100644
--- a/src/test/resources/features/NestedSubAccessTester.fir
+++ b/src/test/resources/features/NestedSubAccessTester.fir
@@ -1,4 +1,4 @@
-; See LICENSE for license details.
+; SPDX-License-Identifier: Apache-2.0
 circuit NestedSubAccessTester :
   module NestedSubAccess :
     input foo : UInt<1>[4]
diff --git a/src/test/resources/features/NodeType.fir b/src/test/resources/features/NodeType.fir
index fe48871b..f55a30ce 100644
--- a/src/test/resources/features/NodeType.fir
+++ b/src/test/resources/features/NodeType.fir
@@ -1,3 +1,4 @@
+; SPDX-License-Identifier: Apache-2.0
 circuit NodeType :
   module NodeType :
     input clock : Clock
diff --git a/src/test/resources/features/PresetTester.fir b/src/test/resources/features/PresetTester.fir
index a2395c99..22bdc5a6 100644
--- a/src/test/resources/features/PresetTester.fir
+++ b/src/test/resources/features/PresetTester.fir
@@ -1,4 +1,4 @@
-
+; SPDX-License-Identifier: Apache-2.0
 circuit PresetTester :
 
   module Test :
diff --git a/src/test/resources/features/Printf.fir b/src/test/resources/features/Printf.fir
index 5e065b9c..cc0aec49 100644
--- a/src/test/resources/features/Printf.fir
+++ b/src/test/resources/features/Printf.fir
@@ -1,4 +1,4 @@
-; See LICENSE for license details.
+; SPDX-License-Identifier: Apache-2.0
 circuit Printf : 
   module Printf : 
     input clock : Clock
diff --git a/src/test/resources/features/ZeroPortMem.fir b/src/test/resources/features/ZeroPortMem.fir
index 96327f5c..1ae4f68c 100644
--- a/src/test/resources/features/ZeroPortMem.fir
+++ b/src/test/resources/features/ZeroPortMem.fir
@@ -1,4 +1,4 @@
-; See LICENSE for license details.
+; SPDX-License-Identifier: Apache-2.0
 circuit ZeroPortMem :
   module ZeroPortMem :
     input clock : Clock
diff --git a/src/test/resources/features/ZeroWidthMem.fir b/src/test/resources/features/ZeroWidthMem.fir
index a909b041..018cc25d 100644
--- a/src/test/resources/features/ZeroWidthMem.fir
+++ b/src/test/resources/features/ZeroWidthMem.fir
@@ -1,4 +1,4 @@
-; See LICENSE for license details.
+; SPDX-License-Identifier: Apache-2.0
 circuit ZeroWidthMem :
   module ZeroWidthMem :
     input clock : Clock