diff --git a/.config/nextest.toml b/.config/nextest.toml
index 4f927d2396..136a21a236 100644
--- a/.config/nextest.toml
+++ b/.config/nextest.toml
@@ -3,7 +3,7 @@
 #
 # The required version should be bumped up if we need new features, performance
 # improvements or bugfixes that are present in newer versions of nextest.
-nextest-version = { required = "0.9.59", recommended = "0.9.64" }
+nextest-version = { required = "0.9.64", recommended = "0.9.64" }
 
 experimental = ["setup-scripts"]
 
@@ -32,3 +32,9 @@ clickhouse-cluster = { max-threads = 1 }
 [[profile.default.overrides]]
 filter = 'package(oximeter-db) and test(replicated)'
 test-group = 'clickhouse-cluster'
+
+[[profile.ci.overrides]]
+filter = 'binary_id(omicron-nexus::test_all)'
+# As of 2023-01-08, the slowest test in test_all takes 196s on a Ryzen 7950X.
+# 900s is a good upper limit that adds a comfortable buffer.
+slow-timeout = { period = '60s', terminate-after = 15 }