diff --git a/Makefile b/Makefile
index 4122661..b1afc22 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 SOURCE ?= file go_bindata github aws_s3 google_cloud_storage godoc_vfs gitlab
-DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb firebird
+DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb
 VERSION ?= $(shell git describe --tags 2>/dev/null | cut -c 2-)
 TEST_FLAGS ?=
 REPO_OWNER ?= $(shell cd .. && basename "$$(pwd)")
diff --git a/database/firebird/firebird_test.go b/database/firebird/firebird_test.go
index c6a8f1f..01872f7 100644
--- a/database/firebird/firebird_test.go
+++ b/database/firebird/firebird_test.go
@@ -38,6 +38,7 @@ var (
 		},
 	}
 	specs = []dktesting.ContainerSpec{
+		{ImageName: "jacobalberty/firebird:2.5-ss", Options: opts},
 		{ImageName: "jacobalberty/firebird:3.0", Options: opts},
 	}
 )
diff --git a/go.sum b/go.sum
index 881a8f8..7581dd9 100644
--- a/go.sum
+++ b/go.sum
@@ -328,7 +328,6 @@ golang.org/x/tools v0.0.0-20190408220357-e5b8258f4918 h1:Nc6hX4GCe+yXisksIiO0/6T
 golang.org/x/tools v0.0.0-20190408220357-e5b8258f4918/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 google.golang.org/api v0.0.0-20180910000450-7ca32eb868bf/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
 google.golang.org/api v0.0.0-20181030000543-1d582fd0359e/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
-google.golang.org/api v0.1.0 h1:K6z2u68e86TPdSdefXdzvXgR1zEMa+459vBSfWYAZkI=
 google.golang.org/api v0.1.0/go.mod h1:UGEZY7KEX120AnNLIHFMKIo4obdJhkp2tPbaPlQx13Y=
 google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/api v0.3.2 h1:iTp+3yyl/KOtxa/d1/JUE0GGSoR6FuW5udver22iwpw=