diff --git a/q2_types/__init__.py b/q2_types/__init__.py
index 5556a18d..2005cd85 100644
--- a/q2_types/__init__.py
+++ b/q2_types/__init__.py
@@ -26,3 +26,8 @@
 importlib.import_module('q2_types.per_sample_sequences')
 importlib.import_module('q2_types.bowtie2')
 importlib.import_module('q2_types.metadata')
+importlib.import_module('q2_types.kraken2')
+importlib.import_module('q2_types.feature_data_mag')
+importlib.import_module('q2_types.genome_data')
+importlib.import_module('q2_types.kaiju')
+importlib.import_module('q2_types.reference_db')
diff --git a/q2_types/feature_data_mag/__init__.py b/q2_types/feature_data_mag/__init__.py
index 7f918d0f..2bceb578 100644
--- a/q2_types/feature_data_mag/__init__.py
+++ b/q2_types/feature_data_mag/__init__.py
@@ -22,4 +22,6 @@
         'OrthologAnnotationDirFmt', 'OrthologFileFmt',
         ]
 
+importlib.import_module('q2_types.feature_data._format')
 importlib.import_module('q2_types.feature_data._transformer')
+importlib.import_module('q2_types.feature_data._type')
diff --git a/q2_types/genome_data/__init__.py b/q2_types/genome_data/__init__.py
index b237850f..fd3d285d 100644
--- a/q2_types/genome_data/__init__.py
+++ b/q2_types/genome_data/__init__.py
@@ -24,4 +24,6 @@
     'SeedOrthologDirFmt', 'BLAST6',
     ]
 
+importlib.import_module('q2_types.genome_data._format')
 importlib.import_module('q2_types.genome_data._transformer')
+importlib.import_module('q2_types.genome_data._type')
diff --git a/q2_types/kaiju/__init__.py b/q2_types/kaiju/__init__.py
index c1f2d1bb..fecac26e 100644
--- a/q2_types/kaiju/__init__.py
+++ b/q2_types/kaiju/__init__.py
@@ -6,7 +6,12 @@
 # The full license is in the file LICENSE, distributed with this software.
 # ----------------------------------------------------------------------------
 
+import importlib
+
 from ._format import KaijuIndexFormat, KaijuDBDirectoryFormat
 from ._type import KaijuDB
 
 __all__ = ["KaijuIndexFormat", "KaijuDBDirectoryFormat", "KaijuDB"]
+
+importlib.import_module('q2_types.kaiju._format')
+importlib.import_module('q2_types.kaiju._type')
diff --git a/q2_types/kraken2/__init__.py b/q2_types/kraken2/__init__.py
index b5628efb..5c311c59 100644
--- a/q2_types/kraken2/__init__.py
+++ b/q2_types/kraken2/__init__.py
@@ -24,4 +24,6 @@
     'BrackenDBFormat', 'BrackenDBDirectoryFormat'
 ]
 
+importlib.import_module('q2_types.kraken2._format')
 importlib.import_module('q2_types.kraken2._transformer')
+importlib.import_module('q2_types.kraken2._type')
diff --git a/q2_types/plugin_setup.py b/q2_types/plugin_setup.py
index b5568273..0f162fd9 100644
--- a/q2_types/plugin_setup.py
+++ b/q2_types/plugin_setup.py
@@ -37,3 +37,8 @@
 importlib.import_module('q2_types.per_sample_sequences')
 importlib.import_module('q2_types.multiplexed_sequences')
 importlib.import_module('q2_types.bowtie2')
+importlib.import_module('q2_types.kraken2')
+importlib.import_module('q2_types.feature_data_mag')
+importlib.import_module('q2_types.genome_data')
+importlib.import_module('q2_types.kaiju')
+importlib.import_module('q2_types.reference_db')
diff --git a/q2_types/reference_db/__init__.py b/q2_types/reference_db/__init__.py
index 41eeeaa4..be66ab92 100644
--- a/q2_types/reference_db/__init__.py
+++ b/q2_types/reference_db/__init__.py
@@ -6,6 +6,7 @@
 # The full license is in the file LICENSE, distributed with this software.
 # ----------------------------------------------------------------------------
 
+import importlib
 
 from q2_types.reference_db._type import (
     ReferenceDB, Diamond, Eggnog, NCBITaxonomy,
@@ -26,3 +27,6 @@
            'DiamondDatabaseDirFmt', 'EggnogRefDirFmt', 'EggnogRefTextFileFmt',
            'EggnogRefBinFileFmt', 'NCBITaxonomyDirFmt', 'NCBITaxonomy',
            'EggnogProteinSequencesDirFmt', 'EggnogProteinSequences']
+
+importlib.import_module('q2_types.reference_db._format')
+importlib.import_module('q2_types.reference_db._type')