diff --git a/build-gating.fmf b/build-gating.fmf
index 2cc1c1a..4189a4a 100644
--- a/build-gating.fmf
+++ b/build-gating.fmf
@@ -27,6 +27,10 @@ adjust:
     environment+:
       WITH_SCL: "scl enable llvm-toolset-14.0"
     when: "collection == llvm-toolset-14.0"
+  - because: "When testing SCL-ized LLVM, the collection must be enabled first"
+    environment+:
+      WITH_SCL: "scl enable llvm-toolset-15.0"
+    when: "collection == llvm-toolset-15.0"
 
 discover:
     - name: compiler-rt tests
diff --git a/sanity/main.fmf b/sanity/main.fmf
index ed8a8f6..5a19784 100644
--- a/sanity/main.fmf
+++ b/sanity/main.fmf
@@ -26,3 +26,7 @@ adjust:
       - llvm-toolset-14.0-clang
       - llvm-toolset-14.0-compiler-rt
     when: collection == llvm-toolset-14.0
+  - require+:
+      - llvm-toolset-15.0-clang
+      - llvm-toolset-15.0-compiler-rt
+    when: collection == llvm-toolset-15.0