diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 6a439ee..91e7dcd 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -29,10 +29,10 @@ jobs:
           - windows-latest
         arch:
           - x64
-        # include:
-        #   - version: 'nightly'
-        #     os: ubuntu-latest
-        #     arch: x64
+        include:
+          - version: 'nightly'
+            os: ubuntu-latest
+            arch: x64
     steps:
       - uses: actions/checkout@v3
       - uses: julia-actions/setup-julia@v1
diff --git a/test/auto_differentiation.jl b/test/auto_differentiation.jl
index 63f94c7..ea3f375 100644
--- a/test/auto_differentiation.jl
+++ b/test/auto_differentiation.jl
@@ -356,12 +356,4 @@
         # @show Zygote.jacobian(g, T(0), T(0), T(0))
     end
 
-    # @testset verbose=true "log" begin
-    #     ∂log∂q(q) = [
-    #         ForwardDiff.derivative(ϵ->log(q+ϵ), 0),
-    #         ForwardDiff.derivative(ϵ->log(q+ϵ*imx), 0),
-    #         ForwardDiff.derivative(ϵ->log(q+ϵ*imy), 0),
-    #         ForwardDiff.derivative(ϵ->log(q+ϵ*imz), 0)
-    #     ]
-    # end
 end
diff --git a/test/runtests.jl b/test/runtests.jl
index e082311..16884c6 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -19,12 +19,39 @@ around the code you don't want to measure:
 
 """
 
+# This is hopefully a temporary clause, for checking the GC behavior on Julia pre-1.10 nightlies,
+# which are failing for unknown reasons, but in ways that resemble behavior other people have found
+# and traced back to the new GC.  This block's code is copied from AbstractAlgebra.jl (under the
+# Simplified "2-clause" BSD License): https://github.com/Nemocas/AbstractAlgebra.jl/pull/1432/files
+if VERSION >= v"1.8.0"
+  GC.enable_logging(true)
+
+  # print gc settings
+  jlmax = @ccall jl_gc_get_max_memory()::UInt64
+  totalmem = @ccall uv_get_total_memory()::UInt64
+  constrmem = @ccall uv_get_constrained_memory()::UInt64
+  println("Memory:   max: ", Base.format_bytes(jlmax))
+  println("        total: ", Base.format_bytes(totalmem))
+  println("       constr: ", Base.format_bytes(constrmem))
+
+#= FIXME/TODO: in the future we may wish to experiment with limiting the GC heap here
+  if VERSION >= v"1.10.0-"
+    # adjust heap size hint
+    memenv = parse(Int, get(ENV, "OSCARCI_MAX_MEM_GB", "5")) * 2^30
+    println("Setting heap size hint to ", Base.format_bytes(memenv))
+    @ccall jl_gc_set_max_memory(memenv::UInt64)::Cvoid
+  end
+=#
+end
+
+
+
 using Quaternionic
 using Test
 using Random, Symbolics, StaticArrays, ForwardDiff, GenericLinearAlgebra,
     ChainRulesTestUtils, Zygote, ChainRulesTestUtils
 
-    import LinearAlgebra
+import LinearAlgebra
 
 using ChainRulesCore
 ChainRulesCore.debug_mode() = true