testing.TB.Errorf
standard libraryThe 1415th most-called standard-library method by production calls. Called 1,607 times across 124 modules; 451 of those run outside tests and generated code.
No change in production calls since 2026-W39.
- prod calls
- 451
- non-test, non-generated
- all calls
- 1,607
- total callsites
- modules
- 124
- distinct callers
- in loop
- 27%
- of prod calls
- in tests
- 72%
- 1,156 calls
- resolved
- 6%
- to a known target
resolution mix
How each call resolves
How each call was attributed. Only resolved kinds, where the target function is known, count toward the ranking. Interface dispatch and unresolved receivers are reported separately and never guessed. Read the taxonomy →
- Embedded method6%Reached through an embedded type.
- Interface method94%Called through an interface. The runtime target may differ.
who calls this
Notable callers
Production calls into TB.Errorf from notable Go projects. Open one on the map to see what else it hammers.
- Protocol Buffers 60 13%
- Istio 44 10%
- Kubernetes 29 6%
- Vault 23 5%
- Tailscale 6 1%
where it's called
Callsites in the wild
12 representative callsites of 1,607, prioritizing in-loop and non-test usage. We link to source, never display it.
-
cockroachdb/cockroach @v19.2.12+incompatible
in loop - in loop
-
gitea.dev @v1.27.3
modules/testlogger/testlogger.go:86
in loop - in loop
- in loop
- in loop
-
jackc/pgx @v3.6.2+incompatible
in loop -
jackc/pgx/v5 @v5.11.0
in loop - in loop
- in loop
- in loop
-
lib/pq @v1.12.3
in loop
top callers
The modules that reach for it
The modules that call TB.Errorf most in this snapshot.
- github.com/quii/learn-go-with-tests17111%
- golang.org/x/net1288%
- github.com/minio/minio1107%
- github.com/go-sql-driver/mysql906%
- github.com/jackc/pgx/v5896%
siblings
More from testing
The other most-called members in this package. See all →