diff --git a/tests/io-channel-helpers.c b/tests/io-channel-helpers.c
index ab988ef4fe..ff156ed3c4 100644
--- a/tests/io-channel-helpers.c
+++ b/tests/io-channel-helpers.c
@@ -6,7 +6,7 @@
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/tests/io-channel-helpers.h b/tests/io-channel-helpers.h
index bb2de6fbb9..3d14043710 100644
--- a/tests/io-channel-helpers.h
+++ b/tests/io-channel-helpers.h
@@ -6,7 +6,7 @@
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/tests/test-base64.c b/tests/test-base64.c
index a7f722c459..3012d7be26 100644
--- a/tests/test-base64.c
+++ b/tests/test-base64.c
@@ -6,7 +6,7 @@
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/tests/test-bufferiszero.c b/tests/test-bufferiszero.c
index 42d194cadf..e45fd31804 100644
--- a/tests/test-bufferiszero.c
+++ b/tests/test-bufferiszero.c
@@ -6,7 +6,7 @@
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/tests/test-crypto-pbkdf.c b/tests/test-crypto-pbkdf.c
index 85ed1f9b33..c50fd639d2 100644
--- a/tests/test-crypto-pbkdf.c
+++ b/tests/test-crypto-pbkdf.c
@@ -6,7 +6,7 @@
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/tests/test-qgraph.c b/tests/test-qgraph.c
index 267291c6ed..ae2f7b2dd8 100644
--- a/tests/test-qgraph.c
+++ b/tests/test-qgraph.c
@@ -5,7 +5,7 @@
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
- * License version 2 as published by the Free Software Foundation.
+ * License version 2.1 as published by the Free Software Foundation.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/tests/test-uuid.c b/tests/test-uuid.c
index 22b4b0727d..c111de5fc1 100644
--- a/tests/test-uuid.c
+++ b/tests/test-uuid.c
@@ -6,7 +6,7 @@
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of