diff --git a/scd-reduction-tools-dev.yml b/scd-reduction-tools-dev.yml
index 1915279bbd32ed829fe57685041ae3c523fa27ff..2ae35c1e73433197c144e27bf0d4440fe420b5a3 100644
--- a/scd-reduction-tools-dev.yml
+++ b/scd-reduction-tools-dev.yml
@@ -5,7 +5,6 @@ name: scd-reduction-tools-dev
 channels:
   - mantid-ornl
   - conda-forge
-  - defaults
 
 dependencies:
   - mantid=6.12.0.2
diff --git a/scd-reduction-tools-qa.yml b/scd-reduction-tools-qa.yml
index b09bb65d8502cd653d7925ce885ebc10d1ba6503..5175d2d5722af91a6d4f4dd5853c8f483f84fb36 100644
--- a/scd-reduction-tools-qa.yml
+++ b/scd-reduction-tools-qa.yml
@@ -5,7 +5,6 @@ name: scd-reduction-tools-qa
 channels:
   - mantid-ornl
   - conda-forge
-  - defaults
 
 dependencies:
   - mantid=6.12.0.2
diff --git a/scd-reduction-tools.yml b/scd-reduction-tools.yml
index ed8db5e00d64c1e5f0e46c5708e71d3b33fe5c34..ae8857e851e02de9a7ece125144946b83761bfb4 100644
--- a/scd-reduction-tools.yml
+++ b/scd-reduction-tools.yml
@@ -5,7 +5,6 @@ name: scd-reduction-tools
 channels:
   - mantid-ornl
   - conda-forge
-  - defaults
 
 dependencies:
   - mantid=6.12.0.2